物理化学学报 >> 1989, Vol. 5 >> Issue (03): 377-380.doi: 10.3866/PKU.WHXB19890324

研究简报 上一篇    下一篇

气相色谱研究金属中陷阱放氢速率常数和激活能

姚大平; 陈文绣   

  1. 中国科学院金属研究所
  • 收稿日期:1987-09-29 修回日期:1988-06-25 发布日期:1989-06-15
  • 通讯作者: 姚大平

THE GAS CHROMATOGRAPH STUDY OF EVOLUTION HYDROGEN RATE CONSTANT AND ACTIVATION ENERGY OF TRAP IN METAL

Yao Daping*; Chen Wenxiu   

  1. Institute of Metal Research; Academia Sinica
  • Received:1987-09-29 Revised:1988-06-25 Published:1989-06-15
  • Contact: Yao Daping

Abstract: The kinetic parameters of grain boundary and precipitate interface in 18 Ni maraging steel were studied by gas chromatograph as hydrogen detctor. The evolution rate peaks of grain boundary and precipitate interface appeared at 378 K and 405 K with 3.00 K min~(-1) heating rate and 0.55mm specimen thickness. The trapactivation energies needed to escape from these sites were obtained from the relationship between peak temperature and heating rate to be 14.2 kJ mol~(-1) and 23.1 kJ mo1~(-1), respectively. The rate constants of hydrogen evolution from these were 3.39 exp (-14.2/RT) min~(-1) and 26.34 exp(-23.1/RT) min~(-1), respectively.