LaO_2对Al_2O_3—TiC_p/Al基复合材料组织结构的影响 |
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引用本文: | 耿在丹,张波.LaO_2对Al_2O_3—TiC_p/Al基复合材料组织结构的影响[J].河南广播电视大学学报,2008,21(3). |
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作者姓名: | 耿在丹 张波 |
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作者单位: | 郑州广播电视大学,河南,郑州,450002 |
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摘 要: | 利用Al-TiO2-C体系熔铸法制备含稀土LaO2原位自生Al2O3-TiCp/Al基复合材料,借助差示扫描量热仪(DSC)、扫描电子显微镜(SEM)、能谱分析仪(EDS)、X射线衍射仪(XRD)等测试技术,对Al-TiO2-C体系的组织结构进行了详尽的分析,讨论了稀土LaO2铝对Al2O3-TiCp/Al基复合材料的影响规律。实验结果表明,稀土LaO2的加入可改善陶瓷颗粒Al2O3和TiC与熔体的润湿性,而且有效细化和净化了组织,降低了反应温度。稀土LaO2添加剂含量为0,5%时利用熔铸法制备的复合材料中原位形的Al2O3,TiC颗粒尺寸较小,分布均匀。
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关 键 词: | LaO2 原住自生 组织结构 Al2O3-TiCp/Al |
Effets of LaO_2 on the Mierostructures of Insitu AI_2O_3-TiC_p/Al Composites |
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Abstract: | The insituAI2O3-TiCp/Al composites with LaO2,successfully fabricated by melting and cast-ing technique in the Al-TiO2-C system.The themrodyrarnic mechanisms of the composites were investigated by menus of DSC,SEM and EDS,XRD techniques et al.The results showed that the addition of LaO2 improved the wet-tability between Al2O3 and Al,and TiC and Al,and got the grains fine in matrix and microstructures pure,and reduced the reaction temperature.When LaO2 content is 0.5% wt,the Al2O3 and TiC particles are small ... |
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Keywords: | LaO2 Al2O3-TiCp/Al |
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