| Fe/Al2O3复合材料的制备和性能 |
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| 引用本文： | 王志,刘健飞,丁寅森,张雷,冯帅,史国普.Fe/Al2O3复合材料的制备和性能[J].材料研究学报,2012(2):206-210. |
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| 作者姓名： | 王志 刘健飞 丁寅森 张雷 冯帅 史国普 |
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| 作者单位： | 济南大学材料科学与工程学院 |
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| 基金项目： | 济南大学博士基金B0514资助项目~~ |
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| 摘 要： | 用石墨埋烧方法制备Fe/Al2O3复合材料,对其力学性能和微观结构进行了分析。结果表明:Fe/Al2O3复合材料的弯曲强度与断裂韧性均随Al2O3含量的升高先升高后降低,当Al2O3含量（质量分数）为70%时,其弯曲强度与断裂韧性分别达到602.49 MPa和9.33 MPa·m1/2,其硬度随Al2O3含量先降低后升高。在烧结过程中在Fe颗粒周围形成一种成分为FeO与FeAl2O4的壳体,在壳体与Fe颗粒之间存在微裂纹缺陷。壳体的形成和壳体与金属颗粒间的微裂纹钝化了外部应力,从而提高了复合材料的韧性。
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| 关 键 词： | 复合材料 Fe/Al2O3 石墨埋烧 力学性能 |
Fabrication and Properties of Fe/Al2O3 Composites |
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| WANG Zhi,LIU Jianfei,DING Yinsen,ZHANG Lei,FENG Shuai,SHI Guopu.Fabrication and Properties of Fe/Al2O3 Composites[J].Chinese Journal of Materials Research,2012(2):206-210. |
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| Authors: | WANG Zhi LIU Jianfei DING Yinsen ZHANG Lei FENG Shuai SHI Guopu |
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| Affiliation: | (School of Materials Science and Engineering,University of Jinan,Jinan 250022) |
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| Abstract: | The Fe/Al2O3 composites with different proportions were prepared by sintering buried in the graphite,the microstructure and properties of Fe/AI2O3 composites were analyzed.The results show that the bending strength and fracture toughness of Fe/AI2O3 composites increase with AI2O3 percent,and then decrease.The bending strength and fracture toughness of Fe/Al2O3 composites reach respectively 602.49 MPa and 9.33 MPa·m1/2,when Al2O3 percent（mass fraction） is 70%.The hardness of Fe/Al2O3 composites decrease with AI2O3 percent,and then increase.The shell composed of FeO and FeAI2O4 formed around Fe particles in the sintering process.Micro cracks exist between the shell and Fe particles. The external stress was cut by the shell and the micro cracks between the shell and Fe particles,then the fracture toughness of Fe/Al2O3 composites enhance greatly. |
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| Keywords: | composite Fe/Al2O3 sintering buried in the graphite mechanical property |
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