AlZrC 2 ÌÄAE@BIÁ«ECE[AfB\EÁ ¬ E MsE|à E´{ EE{½òYEWHpvE ìêKÞ ERû¾ÇÞ ÞAlZrC 2 powder prepared by solidstate reaction was sintered using a pulse electric current sintering technique in a temperature range from 1700 to 2000 C under the pressure of 40 MPa in vacuum for 5 min. The density and mechanical properties of the sintered AlZrC 2 monolith were estimated. As heating temperature increased, the density of the AlZrC 2 monolith increased and the mechanical properties were improved. The bulk density of the AlZrC 2 monolith sintered at 2000 C was 5.12 g/cm 3 . The maximum values of the fracture strength and Vickers' hardness were 380 MPa and 11.1 GPa, respectively.
Zr2Al3C5 has been successfully synthesized via solid state reaction between Al, ZrC and
carbon powder at 1600 in vacuum. This complex carbide has very strong bond between metal
atoms and carbon atoms. Thus, this material has a potential to be utilized as structural materials.
Some properties of Zr2Al3C5 powder from solid-state reaction in vacuum had been tested. It was
found that this powder was completely oxidized in air at 900 1 h, and can be hydrated in moist
air. These drawbacks might come from the high reactivity of the powder due to synthesis in vacuum.
Zr2Al3C5 powder from solid state reaction in vacuum was sintered at various temperatures from
1500 to 2000 under vacuum with pulse electric current sintering (PECS) and pressureless
sintering. Zr2Al3C5 started to sinter at 1500 and got partially dense from 1700. Physical
properties and mechanical properties of this material were investigated and discussed.
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