| ZrB2/Al2O3 composite powders prepared by self-propagating high-temperature synthesis |
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| 作者姓名： | 于志强 杨振国 |
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| 作者单位： | Department of Material Science, Fudan University, Shanghai 200433, China |
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| 基金项目： | Project（KNH2021005） supported by Industrialization Program of Economic Committee of Shanghai |
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| 摘 要： | Self-propagating high-temperature synthesis（SHS） method was used to synthesize ZrB2/Al2O3 composite powders from B2O3-ZrO2-Al system. X-ray diffractometry（XRD） and scanning electron microscopy（SEM） analyses show the presence of ZrB2 and Al2O3 as the primary phases in the composite powders, while the presence of a very small amount of ZrO2 is thought to be unreacted zirconium oxide. Transmission electron microscopy（TEM） and high resolution electron microscopy（HREM） observations of microstructure of the composite powders indicate that the interfaces of ZrB2/Al2O3 bond well without any interracial reaction products. It is proposed that the good interfacial bonding of composite powders results from the ZrB2 particles crystallizing and growing on the Al2O3 particles surface with surface defects acting as nucleation centers.
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| 关 键 词： | ZrB2/Al2O3 复合材料 高温条件 合成方法 微结构 |
| 文章编号： | 1003-6326（2005）04-0851-04 |
| 收稿时间： | 2004-12-08 |
| 修稿时间： | 2005-03-08 |
ZrB2/Al2O3 composite powders prepared by self-propagating high-temperature synthesis |
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| YU Zhi-qiang,YANG Zhen-guo.ZrB2/Al2O3 composite powders prepared by self-propagating high-temperature synthesis[J].Transactions of Nonferrous Metals Society of China,2005,15(4):851-854. |
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| Authors: | YU Zhi-qiang YANG Zhen-guo |
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| Abstract: | Self-propagating high-temperature synthesis(SHS) method was used to synthesize ZrB2/Al2O2 composite powders from B2O3-ZrO2-Al system. X-ray diffractometry(XRD) and scanning electron microscopy(SEM) analyses show the presence of ZrB2 and Al2O3 as the primary phases in the composite powders, while the presence of a very small amount of ZrO2 is thought to be unreacted zirconium oxide. Transmission electron microscopy(TEM) and high resolution electron microscopy(HREM) observations of microstructure of the composite powders indicate that the interfaces of ZrB2/Al2O3 bond well without any interfacial reaction products. It is proposed that the good interfacial bonding of composite powders results from the ZrB2 particles crystallizing and growing on the Al2O3 particles surface with surface defects acting as nucleation centers. |
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| Keywords: | self-propagating high-temperature synthesis zirconium diboride composite powder B2O3 ZrO2 Al system microstructure |
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