摘要
利用自蔓延高温合成法,以Ni粉、Al粉和金刚石为原料,制备Ni-Al基金刚石复相材料。利用XRD、SEM、DSC表征手段,分析研究自蔓延反应产物的物相、组织结构以及微观反应过程。研究表明:试样在600℃、700℃、800℃能够被引燃发生自蔓延反应;当Ni、Al摩尔比为1∶1时,NiAl为其SHS反应产物;当Ni、Al摩尔比为3∶1时,其SHS反应产物为Ni3Al、NiAl。适量的金刚石对两种配比的Ni-Al体系反应放热存在一定减缓作用,但不影响最终产物。不同配比的Ni-Al体系生成的主晶相—NiAl基体、Ni3Al基体能够与金刚石紧密结合。
Ni-Al-based diamond composites were fabricated by self-propagating high temperature synthesis,using Ni,Al powders and diamond as material.The phase compositions and microstructure of the products,and micro reaction process of SHS were studied by SEM,XRD,DSC.The results show that the samples can be ignited at 600 ℃,700 ℃,800 ℃; the product is NiAl which obtained by SHS when Ni： Al = 1： 1（ mole ratio）,and when Ni： Al = 3： 1（ mole ratio） the product are Ni3 Al,NiAl.The appropriate diamond could slow down the rate of exothermic reaction of Ni-Al,but it has less effect on the products.As the main crystal phase which obtained by Ni-Al with different proportions respectively,the NiAl matrix and Ni3 Al matrix can be integrated tightly with the diamond.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2014年第9期2335-2339,共5页
Journal of Synthetic Crystals
基金
河南省省院合作项目(122106000052)
河南省科技开放合作项目(142106000051)
关键词
NI-AL
金刚石
自蔓延高温合成
Ni-Al
diamond
self-propagating high temperature synthesis
