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以Ti_2AlNb“斜方晶”(0)相为基础的钛铝合金已被认为是应用于高温结构领域的最有前途的候选材料之一。近年来大量的研究集中在斜方晶基的Ti-22Al-23Nb(以原子百分比计)方面这是因为它在高温力学性能方面有得以提高的潜力。以往的一些研究显示当同α_2(Ti_3Al)合金相比较时,该合金具有若干引人注目的特性。这些特性包括在室温至760℃的温度之间具有较高的拉伸强度,较好的室温断裂韧性和优良的抗蠕变性能。同高刚度和高强度的SiC纤维的结合预期能进一
Titanium-aluminum alloys based on the “orthorhombic” (0) phase of Ti 2 AlNb have been considered as one of the most promising candidate materials for high-temperature structural applications. In recent years, a large number of studies have focused on the orthorhombic Ti-22Al-23Nb (in atomic percent) because of its potential to enhance the mechanical properties at high temperature. Some previous studies have shown that the alloy has several attractive features when compared with α 2 (Ti 3 Al) alloys. These properties include higher tensile strength at room temperature to 760 ° C, better room temperature fracture toughness, and excellent creep resistance. The combination with high stiffness and high strength SiC fibers is expected to go one in