Journal
APPLIED SURFACE SCIENCE
Volume 346, Issue -, Pages 428-437Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2015.03.184
Keywords
Additive manufacturing; 3D Printing; Hard ceramic coating; Ti-Si-N coating; Wear resistance
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Funding
- Joint Center for Aerospace Technology Innovation (JCATI, Seattle, WA)
- M. J. Murdock Charitable Trust
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In this study, Laser Engineered Net Shaping (LENS (TM)) was employed towards Additive Manufacturing/3D Printing of Ti-Si-N coatings with three different Ti-Si ratios on commercially pure titanium (cp-Ti) substrate. Microstructural analysis, phase analysis using X-ray diffraction, wear resistance and hardness measurements were done on LENS (TM) processed 3D printed coatings. Coatings showed graded microstructures and in situ formed phases. Results showed that microstructural variations and phase changes influence coating's hardness and wear resistance directly. High hardness values were obtained from all samples' top surface where the hardness of coatings can be ranked as 90% Ti-10% Si-N coating (2093.67 +/- 144 HV0.2) >100% Ti-N coating (1846 +/- 68.5 HV0.2)> 75% Ti-25% Si-N coating (1375.3 +/- 61.4 HV0.2). However, wear resistance was more dependent on inherent Si content, and samples with higher Si content showed better wear resistance. (C) 2015 Elsevier B.V. All rights reserved.
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