Experimental Investigation On The Influence Of DLC Coating On The Wear Behaviour Of Helical Gear

The purpose of this research is to investigate the wear behaviour of amorphous hydrogenated carbon (a-C:H) coating deposited on the helical gears through wear debris analysis and oil analysis. The a-C:H coating were selected from various diamond-like carbon (DLC) coating variant using Pareto optimal...

Full description

Saved in:

Bibliographic Details
Main Author:	Abdul Hamid, Abdul Hakim
Format:	Thesis
Language:	English English
Published:	2019
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/24659/1/Experimental%20Investigation%20On%20The%20Influence%20Of%20DLC%20Coating%20On%20The%20Wear%20Behaviour%20Of%20Helical%20Gear.pdf http://eprints.utem.edu.my/id/eprint/24659/2/Experimental%20Investigation%20On%20The%20Influence%20Of%20DLC%20Coating%20On%20The%20Wear%20Behaviour%20Of%20Helical%20Gear.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utem-ep.24659
record_format	uketd_dc
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Mat Dan, Reduan
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Abdul Hamid, Abdul Hakim Experimental Investigation On The Influence Of DLC Coating On The Wear Behaviour Of Helical Gear
description	The purpose of this research is to investigate the wear behaviour of amorphous hydrogenated carbon (a-C:H) coating deposited on the helical gears through wear debris analysis and oil analysis. The a-C:H coating were selected from various diamond-like carbon (DLC) coating variant using Pareto optimal analysis and weighted decision matrix, where it is deemed the most suitable for helical gear testing in this study. Helical gears were tested on a power recirculating test rig with constant loads of 100 Nm and speed of 1000 rpm. The tests were conducted for 9×106 cycles or an initial pitting of 1% covering the surface of the teeth. Samplings were obtained for approximately 60 ml of the lubricant for every 3.6×105 cycles which were then analysed through oil analysis which includes wear debris analysis as well as particle counting. The results revealed that the a-C:H coated gear reduces the particle generation by a factor of 3.11 as compared to the baseline testing. However, a-C:H does not improves the condition of the lubricant where in the uncoated gear, the lubricant oxidation increases per cycles while the coated gear is at a lower value while the viscosity of uncoated gear lubricant decreases per cycle as compared to the coated gear. Gear tooth image analysis reveals that the test reaches a micro-pitting stage with no visible pitting yet observed due to carburization of the base gear. However, a-C:H gears had a reduction in micro-pitting formation as compared to the uncoated gear yet peeling of the coating occurs. This suggest an extension of the life of the gear through the application of a-C:H coating is achievable.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Abdul Hamid, Abdul Hakim
author_facet	Abdul Hamid, Abdul Hakim
author_sort	Abdul Hamid, Abdul Hakim
title	Experimental Investigation On The Influence Of DLC Coating On The Wear Behaviour Of Helical Gear
title_short	Experimental Investigation On The Influence Of DLC Coating On The Wear Behaviour Of Helical Gear
title_full	Experimental Investigation On The Influence Of DLC Coating On The Wear Behaviour Of Helical Gear
title_fullStr	Experimental Investigation On The Influence Of DLC Coating On The Wear Behaviour Of Helical Gear
title_full_unstemmed	Experimental Investigation On The Influence Of DLC Coating On The Wear Behaviour Of Helical Gear
title_sort	experimental investigation on the influence of dlc coating on the wear behaviour of helical gear
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty Of Mechanical Engieering
publishDate	2019
url	http://eprints.utem.edu.my/id/eprint/24659/1/Experimental%20Investigation%20On%20The%20Influence%20Of%20DLC%20Coating%20On%20The%20Wear%20Behaviour%20Of%20Helical%20Gear.pdf http://eprints.utem.edu.my/id/eprint/24659/2/Experimental%20Investigation%20On%20The%20Influence%20Of%20DLC%20Coating%20On%20The%20Wear%20Behaviour%20Of%20Helical%20Gear.pdf
_version_	1747834081343700992
spelling	my-utem-ep.246592021-10-05T12:18:43Z Experimental Investigation On The Influence Of DLC Coating On The Wear Behaviour Of Helical Gear 2019 Abdul Hamid, Abdul Hakim TA Engineering (General). Civil engineering (General) The purpose of this research is to investigate the wear behaviour of amorphous hydrogenated carbon (a-C:H) coating deposited on the helical gears through wear debris analysis and oil analysis. The a-C:H coating were selected from various diamond-like carbon (DLC) coating variant using Pareto optimal analysis and weighted decision matrix, where it is deemed the most suitable for helical gear testing in this study. Helical gears were tested on a power recirculating test rig with constant loads of 100 Nm and speed of 1000 rpm. The tests were conducted for 9×106 cycles or an initial pitting of 1% covering the surface of the teeth. Samplings were obtained for approximately 60 ml of the lubricant for every 3.6×105 cycles which were then analysed through oil analysis which includes wear debris analysis as well as particle counting. The results revealed that the a-C:H coated gear reduces the particle generation by a factor of 3.11 as compared to the baseline testing. However, a-C:H does not improves the condition of the lubricant where in the uncoated gear, the lubricant oxidation increases per cycles while the coated gear is at a lower value while the viscosity of uncoated gear lubricant decreases per cycle as compared to the coated gear. Gear tooth image analysis reveals that the test reaches a micro-pitting stage with no visible pitting yet observed due to carburization of the base gear. However, a-C:H gears had a reduction in micro-pitting formation as compared to the uncoated gear yet peeling of the coating occurs. This suggest an extension of the life of the gear through the application of a-C:H coating is achievable. 2019 Thesis http://eprints.utem.edu.my/id/eprint/24659/ http://eprints.utem.edu.my/id/eprint/24659/1/Experimental%20Investigation%20On%20The%20Influence%20Of%20DLC%20Coating%20On%20The%20Wear%20Behaviour%20Of%20Helical%20Gear.pdf text en public http://eprints.utem.edu.my/id/eprint/24659/2/Experimental%20Investigation%20On%20The%20Influence%20Of%20DLC%20Coating%20On%20The%20Wear%20Behaviour%20Of%20Helical%20Gear.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=116914 mphil masters Universiti Teknikal Malaysia Melaka Faculty Of Mechanical Engieering Mat Dan, Reduan 1. Anderson, D.P., Bowen, E.R., and Wescott, V.C., 1991. Wear Particle Atlas. Massachusets: 2. Spectro Incorporated Industrial Tribology Systems. 3. ASTM, 2019. Standard Test Method for Field Determination of In-Service Fluid Properties Using IR Spectroscopy (ASTM D7889 . 13). [Online] Available at https://www.astm.org/Standards/D7889.html. [Accessed on 11 January 2019]. 4. ASTM, 2015. Standard Practice for Analysis of In-Service Lubricants Using a Particular Five-Part (Dielectric Permittivity, Time-Resolved Dielectric Permittivity with Switching Magnetic Fields, Laser Particle Counter, Microscopic Debris Analysis, and Orbital Viscometer) Integrated Tester (ASTM D7416 - 09(2015)). [Online] 5. Available at https://www.astm.org/Standards/D7416.html. [Accessed on 12 October 2017]. 6. Blau, P.J., 1981. Mechanism for Transitional Friction and Wear Behaviour of Sliding Metals. Wear, 72, pp. 55.66. 7. BS-ISO, 2006. Calculation of Load Capacity of Spur and Helical Gears. Part 2: Calculation of Surface Durability (Pitting) (6336-2: 2006). [Online] Available at https://www.iso.org/standard/36328.html. [Accessed on 13 October 2017]. 8. Burwell, J.T., and Strang, C.D., 1952. On the Empirical Law of Adhesive Wear. Journal of Applied Physics, 23 (1), pp. 18.28. 9. Canale, L.D.C.F., Totten, G.E., and Mesquita, R.A., 2008. Failure Analysis of Heat Treated Steel Components. USA: ASM International. 10. Chauhan, A., and Vaish, R., 2013. Hard Coating Material Selection Using Multi-Criteria Decision Making. Materials and Design, 44, pp. 240.245. 11. Czyzniewski, A., 2009. Preparation and Characterisation of a-C and a-C:H Coatings Deposited by Pulsed Magnetron Sputtering. Surface and Coatings Technology, 203 (8), pp. 1027.1033. 12. Dearnley, P.A., Elwafi, A.M., Chittenden, R.J., and Barton, D.C., 2014. Wear and Friction of Diamondlike-Carbon Coated and Uncoated Steel Roller Bearings Under High Contact Pressure Oil Lubricated Rolling/Sliding Conditions. Journal of Tribology, 136 (2), pp. 114- 125. 13. Dempsey, J., 2001. Gear Damage Detection Using Oil Debris Analysis, In: NASA, 14th International Congress and Exhibition on Condition Monitoring and Diagnostic Engineering Management. Manchester, 4-6 September 2001. National Aeronautics and Space Administration. 14. Dempsey, P.J., Bolander, N., Haynes, C., and Toms, A.M., 2011. Investigation of Bearing Fatigue Damage Life Prediction Using Oil Debris Monitoring. Ohio: NASA. 15. Dempsey, P.J., Kreider, G., and Fichter, T., 2005. Investigation of Tapered Roller Bearing Damage Detection Using Oil Debris Analysis. In: NASA, 2006 IEEE Aerospace Conference, Montana, 4- 11 March. IEEE. 16. Dieter, G., and Schmidt, L., 2009. Engineering Design, 4th Ed., Boston: McGraw-Hill Higher Education. 17. Dimofte, F., and Krantz, T.L., 2008. Tests of Bearings and Gears With Pvd Coatings for Aerospace Transmissions; Results and Problems. In: Bouzakis, K.D., 3rd International Conference on Manufacturing Engineering (ICMEN), Greece, 1-3 October 2008. EEƒ¢M and PCCM. 18. Emerson Process Manager, 2010. AMS Suite: Machinery Health Manager In-Shop Oil Analysis and Laboratory Information Management System. Knoxville: Emerson Process Manager. 19. Errichello, R., 2012. Morphology of Micropitting. Alexendria: American Gear Manufacturer Association. 20. Fernandes, C.M.C.G., Marques, P.M.T., Martins, R.C., and Seabra, J.H.O., 2015. Gearbox Power Loss. Part III: Application to a parallel axis and a planetary gearbox. Tribology International, 88, pp. 317.326. 21. Fernandes, C.M.C.G., Martins, R.C., and Seabra, J.H.O., 2014. Torque Loss of Type C40 22. FZG Gears Lubricated With Wind Turbine Gear Oils. Tribology International, 70, pp. 83. 93. 23. Fernandes, P.J.L., and McDuling, C., 1997. Surface Contact Fatigue Failures In Gears. Engineering Failure Analysis, 4, pp. 99.107. 24. Ferrari, A.C., Robertson, J., Beghi, M.G., Bottani, C.E., Ferulano, R., and Pastorelli, R., 1999. Elastic Constants of Tetrahedral Amorphous Carbon Films by Surface Brillouin Scattering. Applied Physics Letters, 75 (13), pp. 1893.1895. 25. Fujii, M., Ananth Kumar, M., and Yoshida, A., 2011. Influence of DLC Coating Thickness on Tribological Characteristics Under Sliding Rolling Contact Condition. Tribology International, 44 (11), pp. 1289.1295. 26. Fujii, M., Seki, M., and Yoshida, A., 2010. Surface Durability of WC/C Coated Case- Hardened Steel Gear. Journal of Mechanical Science and Technology, 24 (1), pp. 103.106. 27. Gilat, A., and Wu, X., 1997. Plastic Deformation of 1020 Steel Over a Wide Range of Strain Rates and Temperatures. International Journal of Plasticity, 13 (6-7), pp. 611-632. 28. Gopi, V., Sellamuthu, R., and Arul, S., 2014. Measurement of Hardness, Wear Rate and Coefficient of Friction of Surface Refined Al-Cu Alloy. Procedia Engineering, 97, pp. 1355-1360. 29. Hamid, A.H.A., Dan, R.M., Putra, A., Sudin, M.N., Mazlan, R.K., 2019. Wear Behaviour of a-C:H Helical Gear Through Particle Generation. Defence S&T Technical Bulletin, 12 (1). pp. 161-175. 30. Hoehn, B.R., Oster, P., Tobie, T., and Michaelis, K., 2008. Test Methods for Gear Lubricants. Gorivai Maziva, 47 (2), pp. 141.152. 31. Hong, W., Cai, W., Wang, S., and Tomovic, M.M., 2018. Mechanical Wear Debris Feature, Detection, and Diagnosis: A Review. Chinese Journal of Aeronautics, 5, pp. 867-882. 32. Hunt, T.M., 1993. Handbook of Wear Debris Analysis and Particle Detection in Liquids. Essex: Elsevier Science Publishers LTD. 33. Jiang, J.C., Meng, W.J., Evans, A.G., and Cooper, C.V., 2003. Structure and Mechanics of W-DLC Coated Spur Gears. Surface and Coatings Technology, 176 (1), pp. 50.56. 34. Jiang, X., Reichelt, K., and Stritzker, B., 1990. The Hardness and Youngfs Modulus of a- C:H Films. Vacuum, 41 (4.6), pp. 1381.1382. 35. Joachim, F., Kurz, N., and Glatthaar, B., 2002. Influence of Coatings and Surface Improvements on the Lifetime of Gears. VDI Berichte, 2 (1665), pp. 565.582. 36. Kalin, M., and Vi.intin, J., 2005. The Wear and Temperature Behaviour of DLC-Coated Gears Lubricated with Biodegradable Oil. VDI Berichte, 259 (1904 II), pp. 1005.1019. 37. Kalin, M., and Vi.intin, J., 2006. A Comparison of the Tribological Behaviour of Steel/Steel, Steel/DLC and DLC/DLC Contacts when Lubricated with Mineral and Biodegradable Oils. Wear, 261 (1), pp. 22.31. 38. Khan, M.A., and Starr, A.G., 2006. Wear Debris: Basic Features and Machine Health Diagnostics. Insight: Non-Destructive Testing and Condition Monitoring, 48 (8), pp. 470. 476. 39. Koidl, P., Wild, C., Dischler, B., Wagner, J., and Ramsteiner, M., 1990. Plasma Deposition, Properties and Structure of Amorphous Hydrogenated Carbon Films. Materials Science Forum, 52, pp. 41.70. 40. Kramer, P.C., and Speer, J.G., 2014. An Investigation of Rolling-Sliding Contact Fatigue Damage of Carburized Gear Steels, Doctoral dissertation, Colorado School of Mines. 41. Krantz, T., Cooper, C., Townsend, D., and Hansen, B., 2004. Increased Surface Fatigue Lives of Spur Gears by Application of a Coating. Journal of Mechanical Design, 126 (6), pp. 1047-1054. 42. Krumpiegl, T., Meerkamm, H., Fruth, W., Schaufler, C., Erkens, G., and Bohner, H., 1999. Amorphous Carbon Coatings and Their Tribological Behaviour at High Temperatures and in High Vacuum. Surface and Coatings Technology, 120.121, pp. 555.560. 43. Kr.an, B., Kalin, M., and Vi.intin, J., 2006. The Lubrication of DLC Coated Gears with Environmentally Adapted Ester-Based Oil. Gear Technology, 23 (4), pp. 36.40. 44. Kumar, A., Sah, B., Singh, A.R., Deng, Y., He, X., Kumar, P. and Bansal, R.C., 2017. A Review of Multi Criteria Decision Making (MCDM) Towards Sustainable Renewable Energy Development. Renewable and Sustainable Energy Reviews, 69, pp. 596-609. 45. Laghari, M.S., 2002. Surface Feature Recognition of Wear Debris. In: McKay, B. and Slaney, J.K., Australian Joint Conference on Artificial Intelllligence, Canberra, Australia, 46. 2-6 December. Springer. 47. Lee, K.R., Kim, M.G., Cho, S.J., Yong Eun, K., and Seong, T.Y., 1997. Structural Dependence of Mechanical Properties of Si Incorporated Diamond-Like Carbon Films Deposited by RF Plasma-Assisted Chemical Vapour Deposition. Thin Solid Films, 308. 309, pp. 263.267. 48. Leng, X., Chen, Q., and Shao, E., 1988. Initiation and Propagation of Case Crushing Cracks in Rolling Contact Fatigue. Wear, 122 (1), pp. 33.43. 49. Leyland, A., and Mathews, A., 2000. On the Significance of the H/E Ratio in Wear Control: a Nanocomposite Coating Approach to Optimised Tribological Behaviour. Wear, 246, pp. 129-281. 50. Manier, C.A., Theiler, G., Spaltmann, D., Woydt, M., and Ziegele, H., 2010. Benchmark of Thin Film Coatings for Lubricated Slip-Rolling Contacts. Wear, 268 (11.12), pp. 1442. 1454. 51. Mansor, M.R., Hambali, A., Azaman, M.D., Sapuan, S.M., Zainudin, E.S., and Nuraini, A.A., 2013. Material Selection of Thermoplastic Matrix for Hybrid Natural Fiber/Glass Fiber Polymer Composites Using Analytic Hierarchy Process Method. In: Proceeding of the International Symposium on the Analytics Hierarchy Process, Kuala Lumpur, Malaysia, 23-26 June 2013. Creative Decision Foundation. 52. Mansor, M.R., Sapuan, S.M., Hambali, A., Zainudin, E.S., and Nuraini, A.A., 2014a. Materials Selection of Hybrid Bio-Composites Thermoset Matrix for Automotives Bumper Beam Application Using Topsis Method. Advances in Environmental Biology, 8 (8), pp. 3138-3142. 53. Mansor, M.R., Sapuan, S.M., Zainudin, E.S., Nuraini, A.A., and Hambali, A., 2014b. Thermoplastic Matrix Material Selection Using Multi Criteria Decision Making Method for Hybrid Polymer Composites. Applied Mechanics and Materials, 564, pp. 439-443. 54. Mat Dan, R., 2013. Multi-view and Three-dimensional (3D) Images in Wear Debris Analysis (WDA), Doctoral dissertation, University of Manchester. 55. Mayrhofer, P.H., Mitterer, C., Hultman, L., and Clemens, H., 2006. Microstructural Design of Hard Coatings. Progress in Materials Science, 51 (8), pp. 1032.1114. 56. McKenzie, D.R., 1996. Tetrahedral Bonding in Amorphous Carbon. Reports on Progress in Physics, 59 (12), pp. 1611.1664. 57. Michalczewski, R., Piekoszewski, W., Szczerek, M., and Tuszynski, W., 2009. Scuffing Resistance of DLC-Coated Gears Lubricated with Ecological Oil. Estonian Journal of Engineering, 15 (4), pp. 367-373. 58. Michalczewski, R., Piekoszewski, W., Tuszy.ski, W., Szczerek, M., and Wulczy.ski, J., 2011. The New Methods for Scuffing and Pitting Investigation of Coated Materials for Heavy Loaded, Lubricated Elements. In: Kuo, C.H., Tribology - Lubricants and Lubrication, Intech. 59. Michalczewski, R., Szczerek, M., Tuszy, W., and Antonov, M., 2013. The Rolling Contact Fatigue of PVD Coated Spur Gears. Key Engineering Materials, 527, pp. 77-82. 60. Michel, M.D., Muhlen, L.V., Achete, C.A., and Lepienski, C.M., 2006. Fracture Toughness, Hardness and Elastic Modulus of Hydrogenated Amorphous Carbon Films Deposited by Chemical Vapor Deposition. Thin Solid Films, 496 (2), pp. 481.488. 61. Miller, J.L., and Kitaljevich, D., 2000. In-Line Oil Debris Monitor for Aircraft Engine Condition Assessment. In: NASA, 2006 IEEE Aerospace Conference, Montana, 4- 11 March. IEEE. 62. MJR Technology, 2006. Oilview Quick-Check User Manual. [Online] Available at https://www.edprevent.com/wp-content/uploads/2016/08/OilView-Users- Guide.pdf [Accessed on 4 November 2018]. 63. Moorthy, V., and Shaw, B.A., 2012a. Contact Fatigue Performance of Helical Gears with Surface Coatings. Wear, 276.277, pp. 130.140. 64. Moorthy, V., and Shaw, B.A., 2012b. Effect of As-Ground Surface and the BALINIT C and Nb-S Coatings on Contact Fatigue Damage in Gears. Tribology International, 51, pp. 61.70. 65. Moorthy, V., and Shaw, B.A., 2013. An Observation on the Initiation of Micro-Pitting Damage in As-Ground and Coated Gears during Contact Fatigue. Wear, 297 (1.2), pp. 878-884. 66. Muro, H., Tsushima, T., and Nagafuchi, M., 1975. Initiation and Propagation of Surface Cracks in Rolling Fatigue of High Hardness Steel. Wear, 35 (2), pp. 261.282. 67. Olver, A.V., 2005. The Mechanism of Rolling Contact Fatigue: An Update. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 219 (5), pp. 313.330. 68. Park, Y.S., Myung, H.S., Han, J.G., and Hong, B., 2005. The Electrical and Structural Properties of the Hydrogenated Amorphous Carbon Films Grown by Close Field Unbalanced Magnetron Sputtering. Thin Solid Films, 482 (1.2), pp. 275.279. 69. Pastorelli, R., Ferrari, A.C., Beghi, M.G., Bottani, C.E., and Robertson, J., 2000. Elastic Constants of Ultrathin Diamond-Like Carbon Films. Diamond and Related Materials, 9 (3. 6), pp. 825.830. 70. Pennzoil, 2019. Pennzoil DEX-III ATF Product Description. [Online] Available at http://pennzoil.my/wp-content/uploads/2016/01/PDS-GTO-Dex-III-ATF.pdf. [Accessed on 24 January 2019]. 71. Pierson, H.Q., 1994. Handbook of Carbon, Graphite, Diamonds and Fullerenes. 1st ed., USA: Noyes Publication. 72. Podgornik, B., Jacobson, S., and Hogmark, S., 2003. DLC Coating of Boundary Lubricated Components - Advantages of Coating One of the Contact Surfaces Rather than Both or None. Tribology International, 36 (11), pp. 843.849. 73. Raadnui, S., 2005. Wear Particle Analysis - Utilization of Quantitative Computer Image Analysis: A Review. Tribology International, 38 (10), pp. 871.878. 74. Reardon, A.C., 2011. 9.9 Case Hardening. In: Metallurgy for the Non Metallurgist (Reardon, A.C.,2nd ed.), pp. 233-240. Ohio: ASM International. 75. Robertson, J., 2002. Diamond-Like Amorphous Carbon. Materials Science and Engineering: R: Reports, 37 (4.6), pp. 129.281. 76. Roylance, B.J., and Hunt, T.M., 1999. The Wear Debris Analysis Handbook. 1st ed., Oxford: Coxmoor Publishing Company. 77. Roylance, B.J., Williams, J.A., and Dwyer-Joyce, R.S., 2000. Wear Debris and Associated Wear Phenomena - Fundamental Research and Practice. Proceedings of the Institution of Mechanical Engineers Part J-Journal of Engineering Tribology, 214 (Part J), pp. 79.105. 78. Savvides, N., and Window, B., 1985. Diamond like Amorphous Carbon Films Prepared by Magnetron Sputtering of Graphite. Journal of Vacuum Science and Technology A: Vacuum, Surfaces, and Films, 3 (6), pp. 2386.2390. 79. Selcuk, B., Ipek, R., and Karam.., M.B., 2003. A Study on Friction and Wear Behaviour of Carburized, Carbonitrided and Borided AISI 1020 and 5115 Steels. Journal of Material Processing Technology, 141 (2), pp. 189-196. 80. Shotter, B., 1981. Micropitting: Its Characteristics and Implication on the Test Requirements of Gear Oils. Performance and Testing Gear Oils Transmission Fluids, pp. 53-60. 81. Snidle, R.W., Evans, H.P., Alanou, M.P., and Holmes, M.J.A., 2003. Understanding Scuffing and Micropitting of Gears. Security, (June), pp. 7.9. 82. Tunalioglu, M.S., Tuc, B., and Erdin, M.E., 2017. Effect of Coating Material on Wear in Internal Gears. International Journal of Engineering, 30 (11), pp. 1792.1799. 83. Tuszynski, W., Kalbarczyk, M., Michalak, M., Michalczewski, R., and Wieczorek, A., 2015. The Effect of WC/C Coating on the Wear of Bevel Gears Used in Coal Mines. Medziagotyra, 21 (3), pp. 358.363. 84. Van der Kolk, G.J., 2008. Wear Resistance of Amorphous DLC and Metal Containing DLC in Industrial Applications. In: Donnet, C. and Erdemir, A., Tribology of Diamond-Like Carbon Films, pp. 484-493. Boston: Springer. 85. Varma, A., Palshin, V., and Meletis, E.I., 2001. Structure-Property Relationship of Si-DLC Films. Surface and Coatings Technology, 148 (2.3), pp. 305.314. 86. Velmurugan, B., and Vijayakumar, S., 2017. Experimental Analysis of Hard Coating on Spur. International Journal of Advances in Production and Mechanical Engineering, 3 (5), pp. 3.8. 87. Vengudusamy, B., 2011. Behaviour of lubricant additives on DLC coatings. PhD Thesis, Imperial College London. 88. Vengudusamy, B., Green, J.H., Lamb, G.D., and Spikes, H.A., 2012. Behaviour of MoDTC in DLC/DLC and DLC/steel Contacts. Tribology International, 54, pp. 68.76. 89. Wang, R., Mercer, C., Evans, A.G., Cooper, C.V., and Yoon, H.K., 2002. Delamination and Spalling of Diamond-Like-Carbon Tribological Surfaces. Diamond and Related Materials, 11 (10), pp. 1797.1803. 90. Webster, M.N., and Norbart, C.J.J., 1995. An Experimental Investigation of Micropitting Using a Roller Disk Machine. Tribology Transactions, 38 (4), pp. 883.893. 91. Xiao, Y., Shi, W., and Li, L., 2014. Fatigue Performance of Cylindrical Gearing with DLC Coatings. In: Velex, P., International Gear Conference 2014. Lyon, France, 26-28 January. Elsevier. 92. Xu, H., Li, H., Hu, J., and Wang, S., 2013. A Study on Contact Fatigue Performance of Nitrided and Tin Coated Gears. Advances in Materials Science and Engineering, 2013, pp. 1.8. 93. Yin, M., Chen, G., and Su, H., 2016. Theoretical and Experimental Studies on Dynamics of Double-Helical Gear System Supported by Journal Bearings. Advances in Mechanical Engineering, 8 (5), pp. 1.13. 94. Yoshihiko, A., 2010. PVD / PACVD Technology and Equipments of Hauzer Techno Coating. IHI Engineering Review, 43 (2), pp. 89-93. 95. Yuan, C.Q., Peng, Z., Zhou, X.C., and Yan, X.P., 2005. The Characterization of Wear Transitions in Sliding Wear Process Contaminated with Silica and Iron Powder. Tribology International, 38 (2), pp. 129.143. 96. Zhang, J., and Shaw, B.A., 2016. Performance of Gears with WC / C Coating. In: Qin, D. and Shao, Y., Power Transmissions: Proceedings of the International Conference on Power Transmissions 2016, Chongqing, P.R. China, 27-30 October 2016. CRC Press. 97. Zmitrowicz, A., 2005. Wear Debris: A Review of Properties and Constitutive Models. Journal of Theoretical and Applied Mechanics, 43 (1), pp. 3.35.

Experimental Investigation On The Influence Of DLC Coating On The Wear Behaviour Of Helical Gear

Similar Items