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Al₂O₃-SiC纳米复合陶瓷的制备及其表征

Preparation and Characterization of Al₂O₃-SiC Ceramic Nanocomposites

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【Author】 WANG Li-li~(1,2),ZHENG Wei-tao~1,LI Hai-bo~3,DING Tao~1,TIAN Hong-wei~1,YU Shan-sheng~1,MA Nan~1 (1.College of Materials Science and Engineering,Jilin University,Changchun 130012,China;2.College of Science,Changchun University,Changchun 130022,China;3.College of Physics,Jilin Normal University,Siping 136000,Jilin Province,China)

【机构】吉林大学材料科学与工程学院；吉林师范大学物理学院；吉林大学材料科学与工程学院长春130012；长春大学理学院；长春130022；长春130012；吉林省四平136000；

【摘要】以分析纯A l(NO3)3.9H2O,(CH2)6N4和粒径为30 nm的SiC粉末为原料,采用溶胶-凝胶(sol-gel)方法制备干凝胶,经煅烧合成A l2O3-SiC纳米陶瓷粉,利用真空热压装置对粉末进行烧结.通过X射线衍射(XRD)、扫描电镜(SEM)和维氏硬度实验分析了不同SiC含量和不同烧结温度的A l2O3-SiC陶瓷样品的结构、形貌、晶粒尺寸和硬度,并研究了其机理.更多还原

【Abstract】 A dry gel was prepared from Al（NO₃）₃·9H₂O,（CH₂）₆N₄ and SiC powder with a particle size of 30 nm via the sol-gel processing.Al₂O₃-SiC ceramic nanocomposites were obtained from the dry gel by means of vacuum heat-pressing technique.X-ray diffraction,scan electron microscopy and hardness experiment were used to analyze the structure,morphology,grain size and hardness of the Al₂O₃-SiC nanosized ceramic（composites） with different contents of SiC particles sintered at different temperatures.更多还原