放电等离子烧结工艺对不导电材料整体电阻的影响  

Influences of Spark Plasma Sintering Process on Overall Resistance of Non-conductive Materials

作　　者：骆俊廷[1,2] 刘永康[1] 申江龙 张春祥[2] 

机构地区：[1]先进锻压成形技术与科学教育部重点实验室(燕山大学),秦皇岛066004 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,秦皇岛066004

出　　处：《中国机械工程》2015年第18期2524-2527,共4页China Mechanical Engineering

基　　金：燕山大学青年教师自主研究计划资助项目(14LA002)

摘　　要：基于Si3N4纳米陶瓷放电等离子烧结(SPS)试验数据,研究了不导电材料烧结过程中烧结系统整体电阻的变化规律。结果表明:烧结温度与烧结粉体高度是影响烧结系统整体电阻的两大因素,在烧结的升温阶段,电阻随着温度的升高和粉体高度的减小逐渐减小,当粉体烧结致密后,如果烧结温度继续升高,则电阻逐渐增大。根据烧结试验结果,得到了总电阻随烧结温度与粉体初始高度的变化曲线,并用SiC陶瓷材料的SPS试验数据对所拟合公式进行了验证,证明了该公式对不导电材料在SPS烧结过程中烧结系统整体电阻变化规律的适用性。The overall resistance variation of sintering system on non-conductive materials in spark plasma sintering was studied based on experimental data of Si3 N4 nano-ceramic. Results show that sin- tering temperature and the height of the initial powder are the two key factors that affect the overall resistance. In the heating stage, the overall resistance gradually decreases with the rising of tempera- ture and reducing of initial powder height, but when the powder sintering,if the sintering temperature continues to raise, the overall resistance increases gradually. According to the sintering test results, the curve of overall resistance with the initial powder height and the sintering temperature was obtained. And with the SPS test data of SiC ceramic material on the fitting formula was verified, the applicabili- ty of the formula for the spark plasma sintering of non-conductive material was demonstrated.

关 键 词：SI3N4 纳米陶瓷 不导电材料 放电等离子烧结 整体电阻 

分 类 号：TF124[冶金工程—粉末冶金]