摘要
在微观结构研究的基础上,分析了SiC晶须增韧Al_2O_3陶瓷刀具材料的增韧特性和机理。由于受热压过程的影响而造成晶须在基体中定向排布于垂直热压轴方向的平面中,因此不同方向的增韧效果有所差异,而且选取不同平面作为刀具前刀面时在切削中抗破损能力亦不同。研究表明,断续切削时,由于刀头內应力分布的影响,选用平行于热压轴方向的平面作为前刀面将使其获得更高的抗破损能力。
Based on microstructure analysis, the toughening behaviour and mechanism of SiC whisker reinforced Al_2O_3 ceramic tool material have been studied in the paper. During the hot pressing process of SiC whisker reinforced alumina, the whiskers tend to be oriented perpendicular to the hot pressing direction (⊥HPD). So, the toughening performance of the different surface(⊥HPD or∥HPD) and its fracture resistance in cutting is different. Experiments show that the selection of the surface (∥HPD) used as the rake face of the tool is more favourable for the fracture resistance due to stress effect caused in tool tip while interrupted cutting.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1992年第1期1-7,共7页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金
关键词
氧化铝
陶瓷
刀具
碳化硅
韧性
silicon carbide whisker
ceramic tool material
toughening behaviour
interrupted cutting
tool fracture
