论文部分内容阅读
对采用自悬浮定向流技术制备的TiAl金属间化合物纳米粉末进行真空退火,考察退火工艺参数对其相转变过程的影响。X射线衍射等分析表明:随着退火温度的升高以及退火时间的延长,纯a2-Ti3Al相纳米粉末向a-TiAl相转化的程度逐渐增加,其晶粒尺寸也逐渐变大。将其纳米粉末真空压制成块体也有助于上述相转变。对复相的纳米块体进行真空退火,可以得到纯a-TiAl相的纳米晶合金。
The vacuum annealing of TiAl intermetallic compound nano-powders prepared by self-suspended directional flow technology was carried out to investigate the effect of annealing process parameters on the phase transformation process. X-ray diffraction analysis showed that with the increase of annealing temperature and annealing time, pure a2-Ti3Al nano-powder phase to a-TiAl phase gradually increased, and its grain size gradually becomes larger. Pressing the nanopowder into blocks in vacuo also aids in the above phase transitions. The complex phase of nano-block vacuum annealing, you can get pure a-TiAl phase nanocrystalline alloy.