CAJ | 학술논문

介绍了Li2 O-Al2 O3-SiO2微晶玻璃的加工特点。基于纳米划痕技术对Li2 O-Al2 O3-SiO2微晶玻璃进行了纳米划痕实验，测得微晶玻璃材料脆延转变临界切削深度和临界载荷的平均值分别为125．6 nm和29．78 mN。将实验所得临界切削深度值与基于压痕断裂力学模型建立的脆延转变临界切削深度计算值进行了对比，结果表明，T ．G ．Bifano基于显微压痕法给出的临界切削深度计算值与实验结果差别较大，结合实验结果对其公式进行了修正；基于压痕断裂力学模型建立的延性域磨削临界切削深度计算值与实验结果相差较小，并分析了产生差异的原因。
개소료Li2 O-Al2 O3-SiO2미정파리적가공특점。기우납미화흔기술대Li2 O-Al2 O3-SiO2미정파리진행료납미화흔실험，측득미정파리재료취연전변림계절삭심도화림계재하적평균치분별위125．6 nm화29．78 mN。장실험소득림계절삭심도치여기우압흔단렬역학모형건립적취연전변림계절삭심도계산치진행료대비，결과표명，T ．G ．Bifano기우현미압흔법급출적림계절삭심도계산치여실험결과차별교대，결합실험결과대기공식진행료수정；기우압흔단렬역학모형건립적연성역마삭림계절삭심도계산치여실험결과상차교소，병분석료산생차이적원인。
The features of glass-ceramic processing in the Li2 O-Al2 O3-SiO2 system were intro-duced .The nano-scratch experiment on glass-ceramic in the Li2 O-Al2 O3-SiO2 system was per-formed based on nano-scratch technique ,and the mean tested values of brittleness-ductility transition critical-depth-of-cut and critical load of glass-ceramic were 125 .6 nm and 29 .78 mN , respectively .The tested value of critical-depth-of-cut was compared with the calculated value according to the critical condition of brittleness-ductility transition based on indentation frac-ture mechanics .It was showed that the difference between the calculated value of critical-depth-of-cut given by T .G .Bifano based on micro-indentation and the experimental value was remarkable ,thus ,the model was corrected in accordance with experimental value ;There was no obvious difference between the value of critical-depth-of-cut obtained from experiments and the calculation value of ductile-regime grinding critical condition based on indentation fracture mechanics .In addition ,reasons for the difference were also discussed in this paper .