摘要
利用粉末冶金技术,在真空状态下使(Fe-V合金+石墨)体系进行碳化反应原位合成V8C7铁基复合材料,采用SEM和XRD分析复合材料的组织结构和相组成,用MM-200磨损实验机对复合材料进行耐磨性实验。探讨原位合成V8C7的机理。结果表明,石墨的存在降低了σ-(FeV)相的稳定性,促使其在1073 K就分离出少量α-Fe相和金属V。此复合材料主要由增强相V8C7和α-Fe相组成,在重载干滑动磨损条件下显示出很好的耐磨性能。
Using powder metallurgy technology, the carbonization of (FeV + graphite) was carried out and V8C7 iron matrix composite was fabricated in situ in vacuum furnace. SEM, XRD and TEM were used to examine the structure and phase of composite. The wear-resistance of composite was examined on a MM - 200 wear-test machine. The preparation mechanism of V8C7 in situ was analyzed. It was confirmed that graphite reduced the stability of σ-(FeV) , and σ-(FeV) decomposed small quantity of α-Fe and V at 1073 K. The composite was mainly made of V8C7 particles and α-Fe ,and displayed good wear-resistance under dry sliding with heavy load.
出处
《四川大学学报(工程科学版)》
EI
CAS
CSCD
北大核心
2007年第4期113-117,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
科技部中小企业创新基金资助项目(01C26225111100955)
关键词
粉末冶金
原位合成
铁基复合材料
powder metallurgy
fabricated in situ
matrix composite