摘要
用热力学计算证明了氮化反应的可行性,用D TA确定了V N反应的温度范围。通过X RD和SEM比较了两种烧结气氛(真空和氮气)制备的颗粒增强复合材料烧结体的相组成、颗粒大小和形态分布。实验表明,由于V与N的亲合力大于V与C的亲合力,这导致了压坯的增强相由V 6C5、V 4C3向V N的转变;同时在1 200℃α-Fe!γ-Fe的相变为剩余的C的固溶创造了条件。
The sintering compaction of （Fe-V alloy ＋graphite） were carried out using the powder metallurgical technology.The phase comstitutes,size and distributing of particulates reinforced composite were compared by XRD and SEM under the vacuum and nitrogen atmosphere condition.The results show that there is great affinity between V and N, which results in the reinforced phases transformation of V6C5 ,V4C3 to VN at 1200℃, and also there is phase transformation from α-Fe→γ-Fe, which provides the diffuse place for the carbon.
出处
《热加工工艺》
CSCD
北大核心
2006年第2期28-31,共4页
Hot Working Technology
关键词
碳化钒
氮化钒
烧结
颗粒增强
sinter
vanadium carbide
vanadium carbonitride
particulate reinforced
