| La2O3/Al2O3氧化物添加比对Csf/SiC复合材料力学特性的影响 |
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| 引用本文： | 张云龙,胡明,刘友金,张瑞霞,高祥. La2O3/Al2O3氧化物添加比对Csf/SiC复合材料力学特性的影响[J]. 兵器材料科学与工程, 2012, 35(2): 27-30 |
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| 作者姓名： | 张云龙 胡明 刘友金 张瑞霞 高祥 |
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| 作者单位： | 佳木斯大学材料科学与工程学院,黑龙江佳木斯,154007;佳木斯大学材料科学与工程学院,黑龙江佳木斯,154007;佳木斯大学材料科学与工程学院,黑龙江佳木斯,154007;佳木斯大学材料科学与工程学院,黑龙江佳木斯,154007;佳木斯大学材料科学与工程学院,黑龙江佳木斯,154007 |
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| 基金项目： | 黑龙江省教育厅科学技术研究项目(编号1251G062) |
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| 摘 要： | 利用热压烧结技术制备高致密度短碳纤维增韧碳化硅陶瓷基(Csf/SiC)复合材料。研究稀土氧化物添加比对烧结后Csf/SiC复合材料微观结构、力学特性和增韧机制的影响。结果表明:随着烧结助剂中La2O3含量增加,烧结后材料中SiC颗粒平均粒径减小,相对密度逐渐降低,而强度和韧性则先增加后降低;颗粒桥连、纤维拔出和裂纹偏转是该材料体系的主要增韧方式。
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| 关 键 词： | La2O3/Al2O3 Csf/SiC复合材料 力学性能 增韧机制 |
Influence of metal oxide La2O3/Al2O3 proportion on the mechanical properties of Csf/SiC composites |
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| ZHANG Yunlong,HU Ming,LIU Youjin,ZHANG Ruixia,GAO Xiang. Influence of metal oxide La2O3/Al2O3 proportion on the mechanical properties of Csf/SiC composites[J]. Ordnance Material Science and Engineering, 2012, 35(2): 27-30 |
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| Authors: | ZHANG Yunlong HU Ming LIU Youjin ZHANG Ruixia GAO Xiang |
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| Affiliation: | (College of Material Science and Engineering,Jiamusi University,Jiamusi 154007,China) |
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| Abstract: | The compact SiC composites toughened with short carbon fiber were fabricated by hot pressed sintering technology.The effects of additive proportion of rare earth oxides on the microstructure and mechanical properties of Csf/SiC composites were investigated.The results show that an increase in La2O3 vol.% results in the degradation of SiC average grain and relative density in the SiC composites,while the flexural strength and fracture toughness first increases and then decreases.The particle bridging,fiber pull-out and crack deflection are the main toughening mechanisms for Csf/SiC composites. |
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| Keywords: | La2O3/Al2O3 Csf/SiC composites mechanical properties toughening mechanism |
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