Mechanical properties of Al4SiC4 bulk ceramics produced by solid state reaction

作者：Huang Xiao Xiao^*; Wen Guang wu

来源：Ceramics International, 2007, 33(3): 453-458.

DOI：10.1016/j.ceramint.2005.10.009

• mechanical properties
• Al4SiC4
• high temperature mechanical properties
• self-healing properties

The mechanical properties at ambient and high temperature of Al4SiC4 bulk ceramics prepared by solid state reaction were investigated. By increasing the sintering temperature slightly, the room temperature bending strength increased up to 318 MPa, whereas, the fracture toughness decreased with the increase of the sintering temperatures. The high temperature bending strengths of the Al4SiC4 ceramics exhibited anomalous increases within certain temperature ranges especially at 1300 degrees C in air with the highest value of 449.7 MPa, i.e. about 1.5 times of that at room temperature (300 MPa). The self-heating behavior of the flaws on the specimen surface due to the oxidation of the surface layer of the Al4SiC4 ceramics is considered to be the main strength-enhancing mechanism at high temperatures.

• 出版日期2007
• 单位哈尔滨工业大学