氮化硅陶瓷.doc

氮化硅陶瓷的研究作者:王雪董茁卉张磊杨柳范雪孙亚静、陈雅倩、吕海涛、徐志华、张国庆、于希晶。(吉林化工学院 132022 ) 摘要: 氮化硅陶瓷是一种有广阔发展前景的耐高温高强度结构陶瓷。氮化硅陶瓷在高技术陶瓷中占有重要地位,其具有高性能(如强度高、硬度高、抗热震稳定性好、疲劳韧性高、室温抗弯强度高、耐磨、耐化学腐蚀和很好的高温稳定性、抗氧化性能等), 与其他陶瓷相比, 氮化硅陶瓷比重小, 热膨胀系数低, 抗热冲击性好, 断裂韧性高, 是一种理想的高温结构材料和高速切削工具陶瓷材料。因此氮化硅陶瓷在航天航空、汽车发动、机械、化工、石油等领域有着广泛的用途,也为新型高温结构材料的发展开创了新局面。目前氮化硅陶瓷制品主要存在的问题是产品韧性低、成本高。今后应改善制粉、成型、和烧结工艺及氮化硅与碳化硅的复合化, 研制出性能更佳的氮化硅陶瓷。本文介绍了氮化硅陶瓷的基本性能,综述了氮化硅陶瓷的制备工艺和应用领域,并展望了氮化硅陶瓷的发展前景。关键词: 氮化硅;陶瓷;性能;应用; Ab stract: S ilicon nitride ceramics is high temperature and high strength structuralceramics has a broad development prospect. Silicon nitride ceramics occupies an important position in the high technology ceramics, it has high performance(such as high strength, high hardness, good thermal shock stability, hightemperature fatigue toughness, high bending strength, wear resistance,chemical corrosion resistance and high temperature stability, good oxidation resistance properties), compared with other ceramics, silicon nitride ceramics the proportion of small, low thermal expansion coefficient, good heat shock resistance, high fracture toughness, is a kind of ideal candidates for high temperature structural materials and high speed cutting tool , silicon nitride ceramics in aerospace, automobile engine, mechanical,chemical, oil and other fields have a wide range of uses, has created a new situation for the development of new high