Thesis
Strength enhancements of CU/CR multilayers thin film with precipitates
Washington State University
Master of Science (MS), Washington State University
2013
Handle:
https://hdl.handle.net/2376/102384
Abstract
Multilayer thin films are used in high performance applications due to their extremely high hardness. This research focuses on the viability of using precipitates to enhance the strengthening effect in multilayers thin films. Cr/Cu multilayer thin films with layer thickness ranging from 10nm to 30nm were prepared using DC sputtering. Cr was designed as the precipitate added into the system. The mechanical properties of the multilayer thin films were evaluated using nanoindentation. The results shows that Cu/Cr multilayer thin film's hardness is increasing with the decreasing of layer thickness as expected, that precipitates can improve the hardness of Cu/Cr multilayer thin film system, and that the precipitates influence the elastic modulus of the multilayer thin film. TEM was used to characterize the precipitates after annealing. The precipitates formed in this study follow a normal distribution. The result show agreement with the atomistic simulations, The diameter of precipitates more close to the layer thickness, the better precipitates strengthen effect is.
Metrics
4 File views/ downloads
16 Record Views
Details
- Title
- Strength enhancements of CU/CR multilayers thin film with precipitates
- Creators
- Yifan Zhu
- Contributors
- David F. Bahr (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
- 99900525041201842
- Language
- English
- Resource Type
- Thesis