高溫反應燒結制備Ti-45Al-10Nb合金Fabrication of Ti-45Al-10Nb alloy with reaction sintering

采用Ti、Al、Nb三種元素粉末為原料，通過機械球磨和真空熱壓燒結方法，制備全致密的Ti-45Al-10Nb合金。研究球磨粉末形貌，燒結所得坯料的顯微組織及成分分布。結果表明：機械球磨有效地細化與復合Ti、Al和Nb三種單質粉末，球磨后的粉末經1 350 ℃、2 h、50 MPa燒結得到密度為4.3 g/cm³的燒結塊體，其組織為雙態類型。在燒結坯中，三種元素分布均勻。

A full dense Ti-45Al-10Nb alloy was synthesized by mechanical milling and vacuum hot pressing method with three elements: Ti, Al and Nb. The morphology of milled powders, the microstructure and the distribution of major elements of the sintered specimen were studied. The results show that Ti, Al and Nb powders are refined and well-distributed through mechanical milling. Fully dense compacts are conducted using the milled powders at 1 350 ℃ under the load of 50 MPa for 2 h. The density of the sintered alloy is measured to be 4.3 g/cm³. Elements Ti, Al and Nb distribute evenly the sintered alloy.

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