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

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• 作者：Jin-Kyu Lee^a ; Song-Yi Kim^b ; Ryan T. Ott^c ; Jin-Young Kim^d ; Jü ; rgen Eckert^d ; ^e ; Min-Ha Lee^b ; ^{mhlee1@kitech.re.kr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Tungsten ; Nanocrystalline metals ; Metallic glasses ; Mechanical properties ; Spark plasma sintering ; Mechanical alloying and milling
• 刊名：International Journal of Refractory Metals and Hard Materials
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：54
• 期：Complete
• 页码：14-18
• 全文大小：883 K

文摘

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. 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.