| Coating of SiC Powder with Nano YAG Phase |
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| 作者姓名： | 张宁 才庆魁 茹红强 历英 邱关明 孙旭东 |
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| 作者单位： | Department of Materials，Shenyang University，Shenyang 110044，China，Department of Materials，Shenyang University，Shenyang 110044，China，School of Materials and Metallurgy，Northeastern University，Shenyang 110004，China，School of Materials and Metallurgy，Northeastern University，Shenyang 110004，China，School of Materials and Chemical Engineering，Changchun University of Science and Technology，Changchun 130022，China，School of Materials and Metallurgy，Northeastern University，Shenyang 110004，China |
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| 基金项目： | 国家自然科学基金，Project of Liaoning Province Government |
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| 摘 要： | SiCceramiccompositeshavefoundextensiveap plicationsinmodernindustryduetotheirexcellentchemicalstabilityandwear resistance .Rodeghieroetal.1～ 3 ] investigatedthefabricationofSiC Al2 O3 ce ramiccompositematerialsviaco precipitationcoatingandsol gelmethods…
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| 关 键 词： | 陶瓷材料 稀土 质量性能 SiC-YAG 均匀核化作用 异类核化作用 |
Coating of SiC Powder with Nano YAG Phase |
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| Zhang Ning,Cai Qingkui,Ru Hongqiang,Li Ying,QIU Guanming,SUN Xudong.Coating of SiC Powder with Nano YAG Phase[J].Journal of Rare Earths,2005,23(3):299-303. |
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| Authors: | Zhang Ning Cai Qingkui Ru Hongqiang Li Ying QIU Guanming SUN Xudong |
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| Abstract: | SiC-YAG(Y3Al5O12) ceramic composite powders were prepared by co-precipitation coating method. Mechanism of co-precipitation coating of SiC powders with Y3 and Al3 precursors was investigated. If the concentration of OH-] ion in the solution is controlled within the range between critical values for heterogeneous nucleation and homogeneous nucleation, Y3 and Al3 precipitation precursors can be coated on the surface of SiC particles. Y3 and Al3 precipitation precursors transform into YAG phase after calcining at 1000 ℃ without the formation of YAM and YAP phases. The formation temperature of YAG phase is about 600 ℃ lower than that of conventional powder mixing method. The effect of pH value of the solution and precipitant titration rate on coating quality of SiC-YAG composite powders was also studied. The results show that co-precipitation coating can be realized at a final pH of 9 and a precipitant titration rate of 5 ml·min-1. |
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| Keywords: | ceramic materials co-precipitation coating quality SiC-YAG homogeneous nucleation heterogeneous nucleation rare earths |
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