Nonequilibrium alloy powders and bulk alloys in W–Ag system prepared by mechanical alloying and shock compression
Nonequilibrium alloy powders and bulk alloys in W–Ag system prepared by mechanical alloying and shock compression
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DOI：
10.1016/s0925-8388(03)00426-2
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发表时间：
2003-10
影响因子：
6.2
通讯作者：
Xinsheng Huang;T. Mashimo
中科院分区：
文献类型：
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作者：
Xinsheng Huang;T. Mashimo
通过机械合金化（MA）和冲击压缩制备了由亚稳态固溶体和纳米晶体组成的WxAg100−x合金粉末和块体合金。 x=90 时的 MA 处理（21 小时）粉末显示出 b.c.c. 单相的 X 射线衍射 (XRD) 图案。结构，x≤80 时显示了 b.c.c. 两相混合物的 XRD 图谱。和 f.c.c.结构。 b.c.c. 的晶格参数结构相随着研磨时间的增加而增加，并在约 15 小时时接近饱和值。 x=70 和 80 的冲击固结合金块由两层结构组成，即厚的未分解层和薄的分解层。冲击固结合金块体中未分解区域的维氏硬度远高于分解区域的维氏硬度。
WxAg100−xalloy powders and bulk alloys consisting of metastable solid solution and nanocrystals were prepared by mechanical alloying (MA) and shock compression. The MA-treated (21 h) powder for x=90 showed the X-ray diffraction (XRD) pattern of a single phase of b.c.c. structure, and those for x≤80 showed the XRD patterns of two-phase mixtures of b.c.c. and f.c.c. structures. The lattice parameters of the b.c.c. structure phases increased with milling time and approached saturation values at about 15 h. The shock-consolidated bulk alloys for x=70 and 80 consisted of two-layer structures of a thick undecomposed layer and a thin decomposed one. The Vickers hardnesses of the undecomposed areas were much higher than those of the decomposed areas in the shock-consolidated bulk alloys.