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微波烧结和玻璃渗透制备ZrO2全瓷材料
作者:罗军明 廖佳 
单位:南昌航空大学材料科学与工程学院 南昌330063 
关键词:氧化锆 全瓷材料 微波烧结 玻璃渗透 
分类号:R783.1
出版年,卷(期):页码:2014,42(12):0-0
DOI:
摘要:

以3Y-TZP粉体为基体、5% NH4HCO3为造孔剂,通过混合、压制成型后在不同温度进行微波烧结和1 250 ℃玻璃渗透制备ZrO2全瓷材料。结果表明:微波烧结后原3Y-TZP中的单斜相全部转变为四方相,并且通过渗透后物相不变。各个不同温度微波烧结后再渗透试样的密度和显微硬度比未渗透有一定程度提高,断裂韧性和抗弯强度显著提高,其中1200 ℃微波烧结后再渗透的试样晶粒尺寸细小、均匀,其密度、显微硬度、断裂韧性和抗弯强度最高,达到5.88 g/cm3、10.56 GPa、12.01 MPa•m1/2和522.37MPa,分别比未渗透提高了2.1 %、0.6 %、41.0%和55.1%。

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The zirconium dioxide full porcelain material was prepared with the 3Y-TZP powder as a matrix and 5% NH4HCO3 as a pore-forming agent via mixing, compression moulding, microwave-sintering and glass infiltrating at 1 250 ℃. The result shows that a monoclinic phase in 3Y-TZP all turns into a tetragonal phase, and the phase structure does not change after infiltrating. The density and micro-hardness of the samples with infiltrating are greater than those of the samples without infiltrating at different microwave-sintering temperatures. Also, the fracture toughness and bending strength of the samples are improved. The crystallines of the sample microwave-sintered at 1 200 ℃ and infiltrated are smaller and more uniform, and the density, micro-hardness, fracture toughness and bending strength of the samples with infiltrating are 5.88 g/cm3, 10.557 GPa, 12.005 MPa•m1/2 and 522.372 MPa, respectively, which are increased by 2.1 %, 0.60 %, 41.0% and 55.1%, compared to the samples without infiltrating.

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基金项目:
基金项目:国家自然科学基金(51362022;江西省科技 攻关项目(2011BBE50010)资助。
作者简介:
第一作者:罗军明(1968—)男,博士,教授。
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参考文献:


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