纳米晶二元双相Ag50Ni50合金的制备及其显微组织|赵泽良,赵越,王崇琳,牛焱,吴维-《中国有色金属学报》官方网站|全网首发|论文开放获取

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第10卷第3期总第36期 2000年6月

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文章编号：1004-0609(2000)03-0361-04

纳米晶二元双相Ag₅₀Ni₅₀合金的制备及其显微组织

赵泽良，赵越，王崇琳，牛焱，吴维

(中国科学院金属研究所金属腐蚀与防护国家重点实验室，沈阳 110015)

摘要: 用X射线衍射方法研究了球磨驱动制备Ag₅₀Ni₅₀ (摩尔比)合金粉末的机械合金化过程。研究结果表明， Ag₅₀Ni₅₀的混合粉末能形成有一定固溶度和纳米级晶粒的α-Ag和β-Ni两相混合粉末。球磨后的粉末在℃热压后，尽管两相的颗粒都有所长大，但仍然保持纳米尺度。热压块体化的Ag₅₀Ni₅₀合金密度很高，经600 ℃，24h退火处理后，其α-Ag和β-Ni相颗粒均成倍长大。显微组织结果表明合金中存在微米级网状α-Ag相，并讨论了其生成机制。

关键字: 机械合金化；热压；纳米晶；双相合金； Ag₅₀Ni₅₀

Synthesis of twophase nanocrystalline Ag₅₀Ni₅₀ alloy by mechanical alloying and its microstructure

ZHAO Ze-liang, ZHAO Yue, WANG Chong-lin, NIU Yan, WU Wei-tao

（State Key Laboratory for Corrosion and Protection, Institute of Metals Research, The Chinese Academy of Sciences, Shenyang 110015, P.R.China）

Abstract:The Ag₅₀Ni₅₀powder alloy was prepared by mechanical alloying (MA) process and the immiscible AgNi system with a positive heat of mixing was investigated by Xray diffraction (XRD). The results indicate that, ball milling of mixed elemental powders with nominal composition Ag₅₀Ni₅₀ results in the formation of mixtures of supersaturated, nanocrystalline rich-Ag and richNi solid solutions. The grain sizes of Ag and Ni particles remain nanosize after hot pressing at 620℃. The MA Ag₅₀Ni₅₀ alloy possesses excellent density and shows little oxidation. The formation mechanism of the meshwork of richAg was also evaluated.

Key words: mechanical alloying； hot pressing； nanocrystalline； Ag₅₀Ni₅₀

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW