TENSILE AND CREEP STRENGTHS OF HOT-PRESSED SI3N4
TENSILE AND CREEP STRENGTHS OF HOT-PRESSED SI3N4
复制标题
DOI：
10.1007/bf00823215
复制
发表时间：
1975-01-01
影响因子：
4.5
通讯作者：
DIAZ, ES
中科院分区：
文献类型：
--
作者：
KOSSOWSKY, R;MILLER, DG;DIAZ, ES
本文给出了Norton HS-110和HS-130热压Si_3N_4的拉伸、蠕变和持久数据。结果表明，材料的强度是由晶界玻璃相控制的。在高于1000 ℃的高温下，变形由晶界滑动控制。几何必要的楔形裂纹的概念的基础上开发的模型，占应变率，应力，温度，环境和杂质含量的观察到的效果。结果表明，目前热压氮化硅陶瓷材料是蠕变应变极限材料。
Tensile, creep, and stress-rupture data for Norton HS-110 and HS-130 hot-pressed Si3N4are presented. It is shown that the strength of the material is controlled by the grain-boundary glass phase. At elevated temperatures, >1000‡ C, deformation is controlled by grain-boundary sliding. A model based on the concept of geometrically necessary wedge cracks is then developed which accounts for the observed effects of strain rate, stress, temperature, environment, and impurity content. It is concluded that the currently available hot-pressed Si3N4is creep strain limited.