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首页> 外文期刊>Journal of University of Science and Technology Beijing >Densification behavior of high Nb containing TiAl alloys through reactive hot pressing
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Densification behavior of high Nb containing TiAl alloys through reactive hot pressing

机译：反应热压法制备高Nb含量的TiAl合金的致密化行为

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摘要

Densification behavior of high Nb containing TiAl alloys through reactive hot pressing was investigated. The results showed that the density of the sample hot pressed at 1400℃ could reach a near full density of 98.37%. However, the densification abnormality was observed at 1500℃. The diffusion of elemental Nb during microstructural evolution is an important aspect affecting densification, which will form pore nests. With the increase of hot pressing temperature, the diffusion of Nb becomes more adequate. HIP (Hot isostatic pressing) treatment can only decrease porosity to some extent, but cannot eliminate it completely.
机译：研究了高Nb含量的TiAl合金通过反应热压的致密化行为。结果表明，在1400℃热压的样品密度可以达到98.37％的接近全密度。但是，在1500℃观察到致密化异常。 Nb元素在微结构演化过程中的扩散是影响致密化的重要方面，致密化会形成孔穴。随着热压温度的升高，Nb的扩散变得更加充分。 HIP（热等静压）处理只能在某种程度上降低孔隙率，而不能完全消除孔隙率。

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