摘要
CBN的热稳定性是决定CBN性能的重要指标之一 ,本文应用矿相显微镜和差热分析的方法 ,研究了CBN热稳定性和其晶形及晶面结晶程度之间的关系 ,研究表明 :(1)相同粒度的CBN晶体 ,晶形完整 ,表面洁净 ,光泽度好 ,透明度好 ,等积形比例高者 ,其晶体的热稳定性也高 ,反之则低。 (2 )晶面结晶程度高者 ,热稳定性亦高 ;如果晶面有大量微孔 ,说明其晶面的结晶程度相对较低 ,则热稳定性降低。 (3)粒度相同且晶形完整程度一致的晶体 ,其热稳定性并不一定相同 ,还要看晶面结晶程度的高低。在反光显微镜下 ,可以根据晶面微气孔分布多少定性地判断出晶面结晶程度的相对高低。反光显微镜的使用弥补了体视镜或生物显微镜的不足 。
Thermostability is one of the important indexes of CBN. This paper studied the relationship between the thermostability of CBN and its crystal shape and crystallinity by using mineral microscope and DTA. It is found that, CBN crystals with perfact shape, clear planes and transparent have high thermostatility. Those with micropores on the crystal plane have lower crystallinity and thus lower thermostability. By means of reflecting microscope, we can test the thermostatility of CBN, quickly and reliably.
出处
《金刚石与磨料磨具工程》
CAS
2001年第4期13-14,共2页
Diamond & Abrasives Engineering
