Decomposition of a solid solution in the ω phase of the Ti-Zr system under high pressure
Physics of the Solid State(2008)
摘要
Phase separation in the hexagonal ω modification of the Ti-Zr system was observed. The ω → ω 1 + ω 2 decomposition in an equiatomic TiZr alloy after prolonged thermal treatment at P = 5.5 ± 0.6 GPa and T = 440 ± 30°C was revealed using x-ray diffraction. It is found that the concentration dependence of the specific volume of the ω phase of Ti-Zr alloys deviates from the Vegard law to higher values. An isobaric section of the equilibrium P - T - x phase diagram of the Ti-Zr system is shown to have the shape of an eutectoid diagram at pressures higher than 8 GPa.
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关键词
64.75.+g,62.50.+p
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