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.
0.44 ]C 5 . -The title compound is synthesized from a pressed pellet of a mixture of ZrC, Al, SiC, and graphite embedded in Al4C3 powder (vacuum,1973 K, 1 h followed by sintering at about 40 MPa, 1973 K, 5 min) and characterized by powder XRD, TEM, and thermopower and electrical conductivity measurements. The compound crystallizes in the trigonal space group R3m with Z = 3. The structure is composed of electroconductive NaCl-type ZrC slabs separated by [Al 3.56 Si 0.44 ]C 3 layers. The thermoelectric properties of the title material are superior to those of Zr2Al3C4 and Zr3Al3C5, with the power factor reaching 7.6·10 -5 Wm -1 K -2 . -(FUKUDA*, K.; HISAMURA, M.; IWATA, T.; TERA, N.; SATO, K.; J. Solid State
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