Thesis
Additive manufacturing of alumina-titanium based metal-ceramic multi-material structures
Washington State University
Master of Science (MS), Washington State University
2017
Handle:
https://hdl.handle.net/2376/101093
Abstract
The development of new technology requires engineered materials with multiple advanced properties. Researchers and engineers have realized the significance of the innovation of novel materials. Titanium (Ti) based hard coatings and functionally graded materials (FGM) are new types of engineered materials which have gained much interest recently. Titanium based ceramic hard coatings are widely used to protect materials and structures from thermal, chemical and mechanical damage due to high hardness, high wear resistance, and excellent thermal stability. In addition, metal-ceramic FGM has a spatial gradation in composition and microstructure which leads to customized properties. The metal-ceramic FGM takes advantages of both metal and ceramic properties that could be used in specific applications which require high hardness, good wear and corrosion resistance without compromising mechanical strength. However, traditional manufacturing methods have limitations of fabricating high temperature coatings and metal-ceramic FGMs. The objective of this study was to evaluate the possibility of fabricating Ti based ceramic coating and metal-ceramic FGM by adapting laser engineered net shaping (LENSTM) technology. This study consisted of two parts. In the first part of this study, LENSTM was employed to additive manufacturing of Ti-Si-N coatings with three different Ti-Si ratios on commercially pure titanium (cp-Ti) substrate. Microstructural analysis, phase analysis, wear resistance and hardness measurements were performed on LENSTM processed 3D printed coatings. In the second part, LENSTM was utilized to fabricate a Ti/Al2O3 FGM which consisted of a LENSTM fabricated Ti6Al4V section, Ti6Al4V+ Al2O3 composites, and a pure Al2O3 section. SEM characterization, XRD phase analysis, EDS analysis, and microhardness measurements were performed on the cross sectional area of LENSTM processed Ti/Al2O3 FGM.
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Details
- Title
- Additive manufacturing of alumina-titanium based metal-ceramic multi-material structures
- Creators
- Yanning Zhang
- Contributors
- Amit Bandyopadhyay (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525067301842
- Language
- English
- Resource Type
- Thesis