| 放电等离子烧结Ti/Al_2O_3复合材料机制及性能 |
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| 引用本文： | 王志,史国普,赵军,邢国红.放电等离子烧结Ti/Al_2O_3复合材料机制及性能[J].稀有金属材料与工程,2009,38(Z2). |
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| 作者姓名： | 王志 史国普 赵军 邢国红 |
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| 作者单位： | 济南大学,山东,济南,250022 |
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| 基金项目： | 山东省自然科学基金，济南大学博士基金 |
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| 摘 要： | 利用放电等离子烧结技术制备了Ti/Al_2O_3复合材料,并探讨了其烧结机理,对复合材料性能进行测试.结果表明,Ti/Al_2O_3导电网络结构的形成,有利于在烧结过程中形成的"电容器"瞬间击穿,使Al_2O_3遭到轰击而产生放电离子,活化Al_2O_3晶粒,降低烧结温度;当Ti 含量为40%(体积分数,下同)时复合材料的相对密度、弯曲强度、断裂韧性和显微硬度分别为99.74%、1002 MPa、19.73 MPa·m~(1/2)和18.14 GPa;裂纹的桥联、偏转是试验材料力学性能得以提高的主要原因.
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| 关 键 词： | Ti/Al_2O_3复合材料 放电等离子烧结 机制 力学性能 |
Mechanism and Properties of Ti/Al_2O_3 Composites by Spark Plasma Sintering Technique |
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| Wang Zhi,Shi Guopu,Zhao Jun,Xing Guohong.Mechanism and Properties of Ti/Al_2O_3 Composites by Spark Plasma Sintering Technique[J].Rare Metal Materials and Engineering,2009,38(Z2). |
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| Authors: | Wang Zhi Shi Guopu Zhao Jun Xing Guohong |
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| Affiliation: | Wang Zhi,Shi Guopu,Zhao Jun,Xing Guohong (University of Jinan,Jinan 250022,China) |
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| Abstract: | The sintering mechanism of Ti/Al2O3 composites prepared by Spark Plasma Sintering Technique is discussed,and the performances of the composites are studied. The result shows that Ti/Al2O3 composites sintering temperature is lowered,because Ti and Al2O3 form a conductivity network configuration which is liable to breakdown capacitor formed in sintering process to bombard Al2O3 and generate discharge ions activating Al2O3 particles. The density,flexural strength,fracture toughness and Vickers-hardness of the ... |
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| Keywords: | Ti/Al_2O_3 composites spark plasma sintering technique mechanism mechanical property |
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