Synthesis, Physical, and Mechanical Properties of Bulk Zr3Al3C5 Ceramic
An in situ reactive hot-pressing process using zirconium (zirco nium hydride), aluminum, and graphite as staring materials and Si and Y2O3 as additives was used to synthesize bulk Zr3Al3Cs ceramics. This method demonstrates the advantages of easy synthesis, lower sintering temperature, high purity and density, and improved mechanical properties of synthesized Zr3Al3C5, Its electrical and thermal properties were measured. Compared with ZrC, Zr3Al3C5 has a relatively low hardness (Vickers hardness of 12.5 Gpa), comparable stiffness (Youngs modulus of 374 Gpa), but superior strength (flexural strength of 488 Gpa) and toughness (fracture toughness of 4.68 Mpa · m1/2). In addition, the stiffness decreases slowly with increasing tempera ture and at 1600 C remains 78% of that at ambient tempera ture, indicating that Zr3Al3C5 is a potential high-temperature structural ceramic.
Lingfeng He Yanchun Zhou Yiwang Bao Zhijun Lin Jingyang Wang
Shenyang National Laboratory for Materials Science, Institute of Metal Research,Chinese Academy of S Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of
国际会议
广州
英文
1357-1363
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）