云母微晶玻璃/Y-TZP复相材料的制备和力学性能  

Preparation and Mechanical Properties of Mica Glass-Ceramic/Y-TZP Composites

作　　者：梁开明[1] 程慷果[1] 段仁官[1] 万菊林[1] 

机构地区：[1]清华大学材料科学与工程系,北京100084

出　　处：《无机材料学报》1998年第3期315-319,共5页Journal of Inorganic Materials

摘　　要：本文用烧结法制备了云母微晶玻璃／－TZP复相材料，用X光衍射分析（XRD）法测定了材料断裂过程中氧化锆的相变体积分数，用拉曼微探针谱测定了相变区宽度，并对增韧机制进行了研究．结果表明：氧化锆的加入可以显著提高材料的力学性能．当加入40vol％ZrO2时，云母微晶玻璃的强度和断裂韧性分别可达446MPa和4．8MPam1／2氧化锆的相变分数随氧化锆含量的增加而减小，而相变区宽度随氧化锆含量的增加而增大；氧化锆主要通过应力诱导相交增韧机制来提高云母微晶玻璃的断裂韧性，但随着氧化锆含量的增加，裂纹在氧化锆颗粒附近的偏转会进一步提高材料的断裂韧性．Mica glass-ceramic/Y-TZP composites were prepared and characterized. The transformationfraction of t-ZrO2 decreased with the content of Y-TZP, determined by X-ray diffraction analysis(XRD). The transformation width increased with increasing the content of Y-TZP, confirmed by^an micro-area probe method. The mechanical properties of mica glass-ceramic were significatly improved with the incorporation of Y-TZP. The fie-cural strength and fracture toughness ofthe glass ceramic doped with 40vol% ZrO2 were as high as 446MPa and 4.SMPa.m1/2, respectively.The stress-induced t-m transformation of zirconia dominantly contributed to the improvement ofthe fracture toughness; however, crack deflection also played an additive role in the improvementof the fracture toughness of the composites with a relatively higher content of Y-TZP.

关 键 词：氧化锆 云母微晶玻璃 增韧 力学性能 微晶玻璃 

分 类 号：TQ171.733[化学工程—玻璃工业]