EFFECT OF COMPOSITION AND MILLING TIME ON THE SYNTHESIS OF NANOSTRUCTURED Ni-Cu ALLOYS BY MECHANICAL ALLOYING METHOD
EFFECT OF COMPOSITION AND MILLING TIME ON THE SYNTHESIS OF NANOSTRUCTURED Ni-Cu ALLOYS BY MECHANICAL ALLOYING METHOD
复制标题
成分和球磨时间对机械合金化法合成纳米结构Ni-Cu合金的影响
DOI：
--
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
A. Sadighzadeh
中科院分区：
文献类型：
--
作者：
A. Karimbeigi;A. Zakeri;A. Sadighzadeh
镍铜合金一般在各种环境中都表现出良好的耐腐蚀性和抗应力腐蚀开裂性能，这取决于铜含量，具有优异的延展性、中等强度和高韧性[1]。这些合金通常是通过熔化工艺批量制造的。然而，通过使用机械合金化(MA)工艺，可以低成本地生产纳米结构粉末产品[2]。机械合金化是S在20世纪70年代发展起来的一种固态粉末加工技术，用于生产氧化物弥散强化的镍基铁基合金[3]。最近，众所周知，元素混合物的MA可以产生平衡结构和非平衡结构。在这一过程中，研磨部件通过焊接和断裂循环将大量能量传递给粉末，使被加工材料具有高度的化学均质性[4]。在过去的二十年里，已经证明了利用MA可以合成纳米结构材料。本研究采用MA法制备了成分范围较宽的Ni-Cu固溶体合金粉末，并对其结构特征随球磨时间的变化规律进行了报道和讨论。2.实验程序
Ni-Cu alloys generally exhibit good resistance to corrosion and stress corrosion cracking in a variety of environments, which depending on the copper content, have excellent ductility, moderate strength and high toughness [1]. These alloys are commonly fabricated in bulk by melting processes. However, by the use of mechanical alloying (MA) process, a nanostructured powder product can be produced with a low cost [2]. Mechanical alloying, a solid-state powder processing technique, was developed in the 1970’s to produce oxide-dispersion strengthened nickeland iron-base alloys [3]. More recently, it is well known that MA of elemental mixtures can generate equilibrium and non-equilibrium structures. In this process, the grinding components transfer a great amount of energy to the powder by welding and fracture cycles, giving a high chemical homogeneity to the processed material [4]. In the last two decades, it has been shown that nanostructured materials can be synthesized by MA. In this research, Ni-Cu solid solution alloy powders with a wide compositional range are synthesized by MA, and the evolutions of structural characteristics with the milling time are reported and discussed. 2. EXPERIMENTAL PROCEDURE