氮化硅-氧化镁-氧化钇陶瓷的常压烧结  

Presureless Sintering of Silicon Nitride with Magnisia and Yttria

作　　者：毛豫兰[1] 杨海涛[1] 赵雷康[1] 

机构地区：[1]武汉理工大学硅酸盐材料工程教育部重点实验室,武汉430070

出　　处：《武汉理工大学学报》2006年第6期17-19,共3页Journal of Wuhan University of Technology

摘　　要：采用常压烧结工艺制备了Si3N4-MgO-Y2O3陶瓷材料，克服了热压工艺的缺陷。Y2O3的添加量对烧结陶瓷材料的致密化行为和机械性能有很大的影响。常压烧结Si3N4-MgO-Y2O3陶瓷材料，当氧化钇含量（质量分数）为4％～5％时，相对密度达99％，抗弯强度达950MPa，断裂韧性7．5MPa·m^1/2。Si3N4-MgO-Y2O3ceramic materials were fabricated by pressurelexs sintering, which overcome the limitations of hot pressing. The amount of Y2O3 had a strong influence on the densification behavior and mechanical properties of the sintered materials. The pressureless sintered silicon nitride with 5% MgO ＋ 4% Y2O3 achieved a relative density of 99%, a bending strength of 950 MPa and a fracture toughness of 7.5 MPa·m^1/2.

关 键 词：氮化硅 烧结 陶瓷 

分 类 号：TB383[一般工业技术—材料科学与工程]