摘要
采用不同的合成工艺,在高温高压下合成出金刚石复合片（PDC）,并进行磨耗比测试,进而对样品高温热处理前后的磨耗比进行对比。结果表明：在保持其他条件（合成压力,合成温度,合成时间）不变的情况下,样品的磨耗比随烧结温度的升高先增加后减小；随合成时间先增加后减小；随金刚石粒度的增大而增加。测过磨耗比后,对样品进行无气氛保护高温热处理,并再次对样品进行磨耗比测试。试验发现：在较低合成温度或较短合成时间下合成的样品经高温处理后磨耗比较处理前增加,而在较高合成温度或较长合成时间下合成的样品磨耗比减小。经多次试验和分析得出：合成压力在5~5.5GPa,T 3温度下,烧结6分钟为最佳合成工艺,在此条件下合成的金刚石复合片的磨耗比为40×10^4。
In the paper,polycrystalline diamond compacts （PDC）were synthesized under different sintering temperature and time by invariable pressure and their wear resistance were tested.After treatment at 750℃ in air,wear resistance of these PDC were tested again.The results of the experiment show that the G-ratio increases first and then decreases with sintering temperature increasing.Similar results are obtained by different sintering time.The best technology in this experiment is to sinter 6 minutes at the temperature T3.The second sintering in air can improve wear resistance of insufficient sintering PDC.The experiment shown that under the pressure of 5~5.5GPa,temperature T3,sintering time 6 minutes,perfect sample will be obtained,and the G-ratio can reach as high as 40×10 4 .
出处
《超硬材料工程》
CAS
2013年第5期11-15,共5页
Superhard Material Engineering
基金
广西重点实验室建设计划:13-051-10
广西科学基金:桂科青0991087
关键词
高温高压
磨耗比
PDC
high temperature and high pressure
PDC
G-ratio
