无压烧结制备透辉石/AlTiB增韧补强氧化铝基结构陶瓷材料  

Fabrication of Diopside/AlTiB Toughened and Reinforced Alumina Matrix Structural Ceramic Materials by Non-pressure Sintering Process

作　　者：刘长霞[1] 孙军龙[1] 张希华[2] 王保卫[1] Liu, Chang-Xia[1]; Sun, Jun-Long[1]; Zhang, Xi-Hua[2]; Wang, Bao-Wei[1]

机构地区：[1]鲁东大学先进制造与自动化技术重点实验室,烟台264025 [2]山东大学组织工程研究所,济南250061

出　　处：《人工晶体学报》2009年第3期777-781,796,共6页Journal of Synthetic Crystals

基　　金：鲁东大学引进人才基金(No.LY20074303No.LY20074302);山东省自然科学基金(No.Y2007F29)

摘　　要：采用温度梯度无压烧结工艺制备了透辉石/AlTiB增韧补强Al2O3基结构陶瓷材料,探讨了其致密化烧结特性,并对其力学性能进行了测试和分析。研究了透辉石/AlTiB增韧补强Al2O3基结构陶瓷材料的微观结构,并分析了其力学性能和微观结构与透辉石含量的关系。结果表明:与纯Al2O3相比,透辉石/AlTiB增韧补强Al2O3基结构陶瓷材料的力学性能得到明显提高,其中添加6%(体积百分含量,下同)透辉石和4%AlTiB的Al2O3基结构陶瓷材料获得较好的综合力学性能,其硬度、抗弯强度和断裂韧性分别达到16.02 GPa、370 MPa和5.11 MPa.m1/2。力学性能提高的主要原因为:添加相与Al2O3基体之间界面反应的发生以及透辉石和AlTiB对复合材料的协同晶粒细化效应。The diopside/AlTiB toughened alumina matrix structural ceramic materials was prepared by the technology of temperature gradient non-pressure sintering. The sintering densification characteristics, the mechanical properties and microstructures of the composites are studied. Meanwhile, the relations among volume content of diopside, mechanical properties and microstructures of alumina matrix structural ceramic materials are analyzed. The results show that the mechanical properties of diopside/AlTiB toughened and reinforced alumina matrix structural ceramic materials are significantly improved compared with pure alumina. The specimen（90% Al2O3 ＋ 6% diopside ＋ 4% AlTiB）, with hardness of 16.02 GPa, strength of 370 MPa and fracture toughness of 5. 11 MPa · m^1/2, shows excellent performances. Interface reactions among the, additives and alumina matrix and the good grain collaborative refining performances of diopside and AlTiB to alumina contribute to the improvement in mechanical properties.

关 键 词：氧化铝 铝钛硼中间合金 结构陶瓷 无压烧结 

分 类 号：O484[理学—固体物理]