摘要
针对一般氧化铝陶瓷材料断裂韧性差的缺点 ,通过球磨的方法向初始原料氢氧化铝中添加晶种 ,并采用热压烧结方式 ,使氧化铝生长成长柱状晶粒结构 ,产生了明显的增韧效果 ,使这种氧化铝瓷体的断裂韧性比一般氧化铝陶瓷材料提高一倍以上 ,可达到 6 .70 MPa· m1 /2。对几种不同烧结温度下烧结的瓷体进行了显微结构分析和力学性能测试 。
The high fracture toughness alumina ceramics were prepared by hot pressed sintering using calcined α alumina powder made from aluminum hydroxide by seeding of wet grinding abrasion powder The mechanical properties at different sintering temperatures were examined The maximum fracture toughness reaches 6 70 MPa·m 1/2 , which is one time higher than general The microstructure of sintered samples was investigated, which showes elongated grain structure The elongated grain structure is considered to play a significant role effect in the increment of fracture toughness
出处
《材料工程》
EI
CAS
CSCD
北大核心
2001年第8期14-17,共4页
Journal of Materials Engineering
