反应烧结注浆氮化硅陶瓷材料的性能研究
Research on Properties of Silicon Nitride Ceramic Prepared by Reaction-bonded Sintering Grouting
籍丽娟1, 白培康1, 任 卫2, 蒲玉萍 2
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作者单位：(1. 中北大学 材料科学与工程学院, 山西 太原 030051; 2. 钢铁研究总院 粉末冶金室, 北京 100081)
中文关键字：压痕； 断裂韧性； 急冷法； 抗热震性； 氮化硅； 反应烧结； 注浆
英文关键字：indentation; fracture toughness; quenching method; thermal shock resistance; silicon nitride; reaction-bonded sintering; grouting
中文摘要：为了研究注浆法对反应烧结氮化硅抗热震能力及断裂韧性的影响，设计了两种pH值的料浆，采用直接压痕法测定了反应烧结氮化硅陶瓷材料的断裂韧性，并用急冷法研究其热震稳定性。结果表明，pH=11的氮化硅陶瓷试样抗热震的能力优于pH=11.9的试样，前者的断裂韧性可达5.23 MPa·m1/2。
英文摘要：Two kinds of slurry with different pH were prepared in order to investigate the influence of grouting on reaction-bonded sintering silicon nitride. Fracture toughness of reaction-bonded sintering silicon nitride materials was investigated by indentation. Thermal shock resistance was investigated by quenching method. The results show that thermal shock resistance of silicon nitride when pH=11 is better than that of when pH=11.9. Fracture toughness of the former is 5.23 MPa·m1/2.