Amorphous and nanocrystalline Al82Ni10Y8 alloy powder prepared by gas atomization
Amorphous and nanocrystalline Al82Ni10Y8 alloy powder prepared by gas atomization
复制标题
DOI：
10.1016/j.intermet.2004.07.026
复制
发表时间：
2005-03-01
期刊：
影响因子：
4.4
通讯作者：
Liu, FX
中科院分区：
文献类型：
--
作者：
Liu, Y;Liu, ZM;Liu, FX
Al-10Ni-8Y（at.%）采用氩气雾化法制备了Al 2 O3合金粉末，并对雾化粉末的形貌、显微组织、热稳定性、相组成和显微硬度进行了研究。大部分粉体为球形，但不同粒径的粉体表面形貌不同。直径小于15 Pro的粉末的横截面显微结构没有显示出详细的特征，表明存在非晶相或纳米晶结构。当在296、340、366和456 ℃加热时，雾化粉末显示出四个明显的放热峰。检测到玻璃化转变温度T-g、结晶温度T-x和过冷液体区域的温度间隔Δ T-x（=T-x-T-g）为约266、288和22 ℃。Al 82 Ni 10 Y8合金粉末的维氏硬度高达230.6，具有很好的结构应用前景。(c)2004爱思唯尔有限公司保留所有权利。
An Al-10Ni-8Y (at.%) alloy was atomized by Ar gas and the morphology, microstructure, thermal stability, phase composition and microhardness of the as-atomized powder were investigated. Most of the powders are spherical in shape, but the surface morphology was different for powder of different size. The cross-section microstructure of powder with size below 15 Pro in diameter showed no detailed feature, indicating existence of amorphous phase or nanocrystalline structure. The as-atomized powder showed four distinct exothermic peaks when heated at 296, 340, 366 and 456 degrees C. The glass transition temperature T-g, crystallization temperature T-x, and the temperature interval of the supercooled liquid region Delta T-x(=T-x-T-g) were detected to be about 266, 288 and 22 degrees C. The Al82Ni10Y8 alloy powder exhibits a high Vickers hardness of 230.6, and shows great potential for structural application. (c) 2004 Elsevier Ltd. All rights reserved.