About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Functional and Energy Materials
|
Presentation Title |
Characterization of as Selected Laser Melting Built and Vacuum Heat Treated NiTa Alloy for Hard Disc Applications |
Author(s) |
Cheng-Tse Wu, Michael Wu, Gary Chung, C.Y. Ma, Feng Xu, Kinnor Chattopadhyay |
On-Site Speaker (Planned) |
Cheng-Tse Wu |
Abstract Scope |
The semiconductor industry applies an amorphous Nickel-tantalum (NiTa) thin film on disc substrate through sputtering deposition process of a crystalline alloy target. The current Hard Disc storage drive has a layer of amorphous NiTa thin film between the magnetic soft underlayer and the disc substrate. Traditionally, target manufacturers employ a hot-pressing process followed by a hot isostatic press process to form alloy powder (with <25-micrometre size) into a uniform, dense, and crystalline alloy structure. However, the HIP treatment is sophisticated and tends to deform parts resulting in significant costs and material loss. This study investigates a concept of combining an optimized selected laser melting process parameter and a vacuum heat treatment process as an alternative process. The concept aims to reduce cost and to enhance the microstructure of alloy Target. As-printed and post-vacuum heat treated alloy samples will be characterized under optical microscopy and scanning electron microscopy for comparative analysis. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |