Effect of reinforcement phase on the mechanical property of tungsten nanocomposite synthesized by spark plasma sintering

Journal Article · Wed Jul 15 04:00:00 UTC 2015 · International Journal of Refractory and Hard Metals

DOI: https://doi.org/10.1016/j.ijrmhm.2015.07.009 · OSTI ID:1235584

Lee, Jin -Kyu ^[1]; Kim, Song -Yi ^[2]; Ott, Ryan T. ^[3]; Kim, Jin -Young ^[4]; Eckert, Jürgen ^[5]; Lee, Min -Ha ^[2]

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1. Kongju National Univ., Cheonan (Korea)
2. Korea Institute of Industrial Technology, Incheon (Korea)
3. Ames Lab., Ames, IA (United States)
4. IFW Dresden, Dresden (Germany)
5. IFW Dresden, Dresden (Germany); TU Dresden, Dresden (Germany)

Nanostructured tungsten composites were fabricated by spark plasma sintering of nanostructured composite powders. The composite powders, which were synthesized by mechanical milling of tungsten and Ni-based alloy powders, are comprised of alternating layers of tungsten and metallic glass several hundred nanometers in size. The mechanical behavior of the nanostructured W composite is similar to pure tungsten, however, in contrast to monolithic pure tungsten, some macroscopic compressive plasticity accompanies the enhanced maximum strength up to 2.4 GPa by introducing reinforcement. As a result, we have found that the mechanical properties of the composites strongly depend on the uniformity of the nano-grained tungsten matrix and reinforcement phase distribution.

• Research Organization: Ames Laboratory (AMES), Ames, IA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-07CH11358
• OSTI ID: 1235584
• Report Number(s): IS-J--8886; PII: S0263436815300834
• Journal Information: International Journal of Refractory and Hard Metals, Journal Name: International Journal of Refractory and Hard Metals Journal Issue: C Vol. 54; ISSN 0263-4368
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English