Publication Date:
2016-03-26
Description:
Reaction sintering of sodium carbaboride (NaB 5 C) was performed by heating compacts of mixtures of amorphous boron (B) and carbon black (C) powders (B/C molar ratio, 5/1) at 1173 K in Na vapor. The ceramics obtained from the compacts of B 5 /C powder mixed with a ball mill (compact density, 1.67 Mg/m 3 ) were the composites of NaB 5 C (74 mass%) and unreacted B 5 /C (26 mass%). The bulk density and bending strength of the composite ceramics were 2.04 ± 0.03 Mg/m 3 and 320.9 ± 10.4 MPa, respectively. Transmission electron microscope observation revealed that nanometer-size amorphous grains of B or C were included in the matrix of NaB 5 C.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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