Abstract
ZrC-TiC solid solutions are considered as a promising candidate for ultra-high-temperature structural applications. ZrxTi1-xC (x=0, 0.2, 0.4, 0.6, 0.8, 1.0) solid solutions have been prepared by combustion synthesis method using Zr, Ti and C elemental powder. The effect of Zr/Ti mole ratio on the phase composition, microstructure, oxidation resistance and near-infrared emission property of the synthesized samples were investigated. It was found that the prepared samples with different Zr/Ti mole ratio all have formed a single cubic structure. The grain size of Ti rich solid solution developed to a larger size than that of Zr rich samples. ZrxTi1-xC solid solution with x=0.4 has a higher starting oxidation temperature of ∼650°C than that of the other solid solution samples. The prepared solid solution with x=0.4 also shows the largest emissivity of 0.79 in 0.75-2.5μm and 0.76 in 3-5μm wavelength range. The prepared ZrxTi1-xCsolid solution samples by combustion synthesis method, which exhibit good near-infrared emission property could be regard as a promising ablation resistant material.
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