摘要
以ZrO(NO3)2·2H2O和四方ZrO2晶须为原料,采用醇-水溶液加热法并结合冷冻干燥法制备了多孔ZrO2(w)/ZrO2陶瓷基复合材料。研究了四方ZrO2晶须对多孔ZrO2(w)/ZrO2复合材料相成分、微结构、热导率及抗压强度的影响。结果表明,ZrO2晶须可以有效抑制ZrO2由四方相转变为单斜相,当烧结温度为1100℃时,多孔ZrO2(w)/ZrO2复合材料全部为四方相,其热导率远小于全部为单斜相的多孔ZrO2陶瓷,抗压强度明显大于多孔ZrO2陶瓷。
A ZrO2（w）/ZrO2 ceramic matrix composite is fabricated by using heating alcohol-aqueous solution and freeze-drying method with ZrO（NO3）2·2H2O and tetragonal ZrO2 whisker as start materials. The effects of tetragonal ZrO2 whisker on the phase composition, microstructure, thermal conductivity and compressive strength of porous ZrO2（w）/ZrO2 composite are investigated. The results indicate that ZrO2 whisker could restrain the transformation of ZrO2 from tetragonal to monoclinic effectively. When the sintering temperature is 1 100℃, porous ZrO2（w）/ZrO2 composite is composed of tetragonal phase, and ZrO2 ceramic is composed of monoelinic phase. The thermal conductivity of porous ZrO2（w）/ZrO2composite is far less than that of porous ZrO2 ceramic. And the compressive strength of porous ZrO2（w）/ZrO2 composite is much higher than that of porous ZrO2 ceramic.
出处
《航空制造技术》
2010年第11期76-79,84,共5页
Aeronautical Manufacturing Technology
关键词
ZrO2晶须
隔热材料
热导率
抗压强度
ZrO2 whisker Insulation material Thermal conductivity Compressive strength
