论文部分内容阅读
采用激光诱导自蔓延反应合成制备了Ti-Fe-Ni三元合金。实验结果表明,当第三组元Ni含量介于12 at.%之内时,合成产物仍保持Ti70.5Fe29.5共晶合金的相组成,即是由β-Ti固溶体、TiFe和Ti2Fe金属间化合物所组成。但随着Ni含量的增加,合成产物中β-Ti固溶体的数量逐渐减少,而TiFe和Ti2Fe金属间化合物的数量逐渐增加。同时组织形态也由共晶组织逐渐转变为过共晶组织。随着Ni含量的增加,合成样品的致密度逐渐降低;由于受合成样品微观组织和致密性这两种因素的综合作用,致使Ni含量为9 at.%的合成样品具有高的硬度、强度及良好的塑性。
The Ti-Fe-Ni ternary alloy was prepared by laser-induced self-propagating reaction. The experimental results show that the phase composition of Ti70.5Fe29.5 eutectic alloy is retained when the content of Ni in the third component is within 12 at.%, That is, the phase composition of β-Ti solid solution, TiFe and Ti2Fe intermetallics Compound. However, with the increase of Ni content, the amount of β-Ti solid solution gradually decreased, while the amount of TiFe and Ti2Fe intermetallic compounds gradually increased. At the same time the organizational form from eutectic gradually transformed into hypereutectic structure. With the increase of Ni content, the densification degree of the synthesized samples decreased gradually. Due to the combination of microstructure and compactness of the synthesized samples, the synthesized samples with Ni content of 9 at.% Had high hardness and strength Good plasticity.