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The flexural strength of 30% (volume fraction) ZrC particle reinforced tungsten composite (ZrC p/W) at 20 ～ 1?200?℃ were measured using three point bending, and the fracture behaviors of the samples at 20?℃ and 1?000?℃ were studied with a scanning electron microscope. As temperature increases, the strength of the composite increases firstly and the highest strength value, 829 is measured at 1?000?℃, and then the strength decreases when temperature is over 1?000?℃. The fracture of the composite at 20?℃, which is controlled by the crack initiating process, is brittle, and the corresponding stress deflection curve is linear. There is a metastable growth and coalescence of the initial cracks during the fracture process of the samples at 1?000?℃, and the stress deflection curve displays a nonlinear characteristic. The good elevated strength of the composite is partly attributed to the W grain interior strength and ZrC p/W interface strength. The reinforcement at high temperature is mainly attributed to the load transfer of ZrC p/W interface and dislocation strengthening.
The flexural strength of 30% (volume fraction) ZrC particle reinforced tungsten composite (ZrC p / W) at 20 ~ 1 ~ 200 ℃ ℃ were measured using three point bending, and the fracture behaviors of the samples at 20 ℃ and 1 ~ As temperature increases, the strength of the composite increases first and the highest strength value, 829 is measured at 1? 000? C, and then the strength decreases when temperature is over 1? 000 ° C. The fracture of the composite at 20 ° C, which is controlled by the crack initiation process, is brittle, and the corresponding stress deflection curve is linear. There is a metastable growth and coalescence of the initial cracks during the fracture process of the samples at 1 000 ° C, and the stress deflection curve displays a nonlinear characteristic. The good elevated strength of the composite is partly attributed to the W grain interior strength and ZrC p / W interface strength. The reinforcement at high temperature is mainly attributed to the load transfer of ZrC p / W interface and dislocation strengthening.