| AlN-Pr2O3液相烧结SiC陶瓷 |
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| 引用本文： | 潘文高,吴澜尔,江涌,黄振坤.AlN-Pr2O3液相烧结SiC陶瓷[J].硅酸盐通报,2018,37(2):430-435. |
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| 作者姓名： | 潘文高 吴澜尔 江涌 黄振坤 |
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| 作者单位： | 北方民族大学材料科学与工程学院,银川,750021 |
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| 基金项目： | 国家自然科学基金(NSFC51362001)%北方民族大学高校重点引智项目(X2017006) |
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| 摘 要： | 以AlN、Pr2O3做为SiC陶瓷液相烧结的复合助剂,选定不同的助剂含量(5wt％～ 20wt％)和不同的助剂摩尔比例(Pr2O3/AlN=1/3、1/1、3/1),在1800～2000℃温度下,采用热压和无压烧结的方法制备SiC陶瓷样品,并对这些陶瓷样品的性能进行了研究.实验结果表明,助剂比1/3组的样品显示出更有效地促进SiC陶瓷致密化,该组样品无压烧结最大相对密度为87％,热压烧结具有最高的相对密度96.1％、维氏硬度23.4 GPa、抗弯强度549.7MPa、断裂韧性5.36 MPa·m1/2,显微结构中可观察到晶粒拔出现象,断裂模式为沿晶断裂.
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| 关 键 词： | 氮化铝 氧化镨 液相烧结 SiC陶瓷 |
Liquid Phase Sintering of SiC with AlN-Pr2O3 Additives |
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| PAN Wen-gao,WU Lan-er,JIANG Yong,HUANG Zhen-kun.Liquid Phase Sintering of SiC with AlN-Pr2O3 Additives[J].Bulletin of the Chinese Ceramic Society,2018,37(2):430-435. |
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| Authors: | PAN Wen-gao WU Lan-er JIANG Yong HUANG Zhen-kun |
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| Abstract: | In present work,samples of SiC ceramic with AlN-Pr2O3 additives in different content (5wt％-20wt％) and different mole ratio (Pr2O3/AlN =1/3,1/1,3/1) were prepared by hot pressed (HP) and pressureless sintering at 1800-2000 ℃,and its performance were investigated.The results show that samples in group 1/3 can promote the densification of SiC ceramics more effectively.The maximal relative density of 1/3 group is 87％ by pressureless sintering,while the supreme relative density,hardness,flexure strength and fracture toughness are achieved by HP,as 96.1％,23.4 GPa,549.7 MPa,5.36 MPa · m1/2,respectively.Phenomenon of grain pull-out is observed in microstructure and the fracture mode is intergranular fracture. |
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| Keywords: | AlN Pr2O3 liquid phase sintering SiC ceramic |
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