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W-Cr alloys have been prepared by high-gravity combustion synthesis from aluminothermic reactions. The alloy with the composition of W0.5Cr0.5 shows a hierarchical microstructure composed of both micro- and nano-sized grains, which is proposed to be produced by spinodal decomposition. The hierarchical microstructure contributes to an improved hardness of 11.2 GPa, which almost doubles that of the...
A new method is reported for fast fabrication of W–Cr alloys by combustion synthesis under Ar gas pressure of 2MPa. The W–Cr alloy with W/Cr=1 in atomic ratio shows a hierarchical microstructure consisting of both micro- and nano-sized grains, which is proposed to be produced by spinodal decomposition. The hierarchical microstructure contributes to an improved hardness of 9.6GPa, which is about 50%...
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