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: The continuous carbon fiber reinforced silicon carbide (C/SiC) composites were studied, and the fiber fabric 3D simulation software developed. The 2.5D fiber fabric and 3D4Dr fiber fabric C/SiC composites... strength and fracture toughness of C/SiC composites with 3D4Dr fiber fabric reach 399.2 MPa, 38.1 MPa and 16.0 MPa·m1/2, respectively, which are better than those of the composites with 2.5D fiber......
, Shenyang 110016, China摘 要:<正>In SiC(f)/Ti-6Al-4V composites, the microstructure of the matrix close to the fiber was different from that of the fiber-less... nucleation rate due to the undeformed SiC fiber and thermal residual stress induced during cooling from the fabrication temperature caused the microstructural changes of the matrix. Hardness measurement......
-temperature behavior, high conductivity, good wear-resistance and high strength [1, 2]. These properties have made SiC particle, whisker or fiber reinforced aluminum matrix composites attractive candidates for various application fields [3-5]. Nevertheless, the reinforcements in forms of SiC particle, whisker or fiber in the reinforced aluminum matrix composites are easy to fall off from the base......
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文章编号:1004-0609(2015)08-2146-11 多孔SiC陶瓷的研究进展 陈以心,王日初,王小锋,彭超群,孙月花 (中南大学 材料科学与工程学院,长沙 410083) 摘 要:多孔碳化硅(SiC)陶瓷具有力学性能优异,耐腐蚀,耐高温和热导率高等优点,在冶金,化工,环保和能源等领域拥有广阔的应用前景.综述多孔SiC陶瓷的孔隙特性,力学性能和导热性能；将常用的多孔SiC陶瓷制备方法分为4类并加以阐述,即颗粒堆积烧结法,模板法,添加造孔剂法和直接发泡成形法；介绍多孔SiC陶瓷的应用；展望多孔SiC陶瓷的发展方向. 关键词:SiC；多孔陶瓷；制备技术；应用 中图分类号:TQ174 文献标志码......
SiC颗粒表面处理对6066Al基复合材料力学性能的影响 王日初1, 毕 豫2, 黄伯云1, 张传福3 (1. 中南大学 材料科学与工程学院, 湖南 长沙, 410083;2. 河南工业大学 材料科学与工程学院, 河南 郑州, 450007;3. 中南大学 冶金科学与工程学院, 湖南 长沙, 410083) 摘要: 分别对SiC颗粒进行高温氧化,酸洗和高温氧化后再酸洗等表面处理,采用粉末冶金工艺制备了SiC颗粒增强的6066Al基复合材料.金相显微照片,扫描电镜照片和室温拉伸性能分析结果表明:采用氧化和酸洗表面处理工艺能使SiC颗粒产生明显钝化,且随着氧化时间的延长,钝化效果提高,SiC颗粒分布更均匀;随着氧化时间的延长,复合材料的抗拉强度σb和断裂韧性KIC提高,且酸洗态的性能优于相应氧化态的性能;6066Al基复合材料的力学性能除与SiC颗粒分布的均匀程度有关外,还......
文章编号:1004-0609(2007)11-1833-05 近净成形制备SiC/Al复合材料Ⅰ:SiC预成形坯的制备 刘君武,郑治祥,吴玉程,王建民,汤文明,吕 君,徐光青 (合肥工业大学 材料学院,合肥 230009) 摘 要:以微米级的碳化硅粉和石墨粉为原料,采用氧化结合法制备出不同孔隙含量的,适合液态铝无压渗透的SiC预成形坯.研究SiC多孔陶瓷的低温烧结机理和石墨添加量对SiC陶瓷骨架烧结密度和尺寸变化的影响.结果表明:在1 100 ℃烧结时,碳化硅和石墨粉同时发生氧化反应；SiC氧化产生的结晶态SiO2膜将SiC粉体粘结成陶瓷骨架,石墨氧化去除后形成孔隙；SiC粉体间本征孔隙和石墨去除后留下的孔隙构成三维互连通状态；因SiC氧化导致陶瓷骨架产生4%左右的线膨胀,但坯体不发生形状改变；通过调整石墨含量,能获得孔隙率从0.47~0.63的SiC陶瓷......
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-coated SiC fiber reinforced γ-TiAl matrix composites[J]. Transactions of Nonferrous Metals Society of China, 2016, 26(5): 1317-1325. [16] HOMENY J, BUCKLEY M M. Transmission electron microscopy study... using M40 carbon fiber, KD-II SiC fiber and Nextel610 Al2O3 fiber as reinforced materials, the matrix alloy was ZL301, the effects of reinforced fiber on interface and mechanical properties......
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