Microstructure and Morphology of Mechanical Alloying Ni/SiC Compound Powder

Wang Rong; Ma Haibo; Wei Deqiang

doi:10.15980/j.tzzz.2015.11.025

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Microstructure and Morphology of Mechanical Alloying Ni/SiC Compound Powder
Vol. 35, Issue 11, Pages: 1209-1212(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.11.025

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[1]王荣,马海波,魏德强.机械合金化处理Ni/SiC复合粉末的组织形貌[J].特种铸造及有色合金,2015,35(11):1209-1212.

Wang Rong, Ma Haibo, Wei Deqiang. Microstructure and Morphology of Mechanical Alloying Ni/SiC Compound Powder. [J]. Special Casting & Nonferrous Alloys 35(11):1209-1212(2015)
[1]王荣,马海波,魏德强.机械合金化处理Ni/SiC复合粉末的组织形貌[J].特种铸造及有色合金,2015,35(11):1209-1212. DOI： 10.15980/j.tzzz.2015.11.025.

Wang Rong, Ma Haibo, Wei Deqiang. Microstructure and Morphology of Mechanical Alloying Ni/SiC Compound Powder. [J]. Special Casting & Nonferrous Alloys 35(11):1209-1212(2015) DOI： 10.15980/j.tzzz.2015.11.025.

摘要

采用机械合金化技术制备Ni-30SiC复合粉末

借助扫描电镜和能谱仪对球磨后Ni-SiC复合粉末的组织形貌进行分析

确定了Ni对SiC粉末颗粒的包覆作用以及两种粉末的均匀混合状态。结果表明

随着球磨时间延长

Ni对SiC粉末颗粒包覆效果逐渐明显且两种粉末混合越发均匀;球磨时间存在一个最佳值

过长的球磨时间则会破坏包覆效果;过高的转速会加快包覆层的加工硬化而使其脱落

使得包覆效果变差;当球磨时间为20h

球磨转速为300r/min

球料比10∶1时

Ni对SiC粉末颗粒已有较大程度的包覆效果

且Ni、SiC颗粒均匀混合。

Abstract

Ni-30 SiC composite powder was prepared by mechanical alloying.The microstructure and morphology of Ni-SiC composite powder after ball-milling were analyzed by SEM and EDS to understand role of Ni in cladding SiC particle and the uniformly mixed degree of two kinds of powder.The results reveal that with increasing ball milling time

the cladding effects of Ni in SiC particles are enhanced increasingly with more uniform mixture of two powders.There exists a optimized ball-milling time

and the cladding effects can be weakened when ball-milling time is more than the optimized value.In addition

the excessive rotating velocity can promote the working hardening of cladding layer to fall off

resulting in the worse cladding effects.With milling time of 20 h

milling speed of 300r/min and ball to powder ratio of 10∶1

SiC powder particles are coated well by Ni with uniform mixture of the two kinds of powder.