首页> 外文期刊>Philosophical Magazine Letters >Diffusion of Fe in Au under elevated Ha pressure
【24h】

Diffusion of Fe in Au under elevated Ha pressure

机译:Ha高压下Fe在Au中的扩散

获取原文
获取原文并翻译 | 示例
           

摘要

The diffusion coefficient D*_(Fe) of Fe in Au under a H_2 pressure of 5 GPa has been determined in the temperature range from 1004 to 1301 K by relating the interdiffusion coefficients in single-phase Au-(Au-Fe) couples with the Darken-Manning relation. The value of D*_(Fe) in Au at 1301K under a H_2 pressure of 5 GPa is three times that under a pressure of 5 GPa without H_2, whereas the former is one tenth of that under a He pressure of 0.l MPa. The temperature dependence of D*_(Fe) in Au under a H_2 pressure of 5 GPa can be expressed as D*_(Fe) = 7.8_(-5.6)~(+20) x 10~(-6) exp(-195 + - 12kJmol~(-1)/RT)m~2 s~(-1). The pre-exponential factor is nearly equal to that in He at O.lMPa, although the activation energy is only 21kJmol~' larger than that observed in He at O.lMPa. This behaviour contrasts with that in gamma-Fe, which has a very high solubility of H_2 under high pressures.
机译:通过将单相Au-(Au-Fe)对中的互扩散系数与100-1301 K的温度范围相关联,确定了在5 GPa的H_2压力下,Fe在Au中的扩散系数D * _(Fe)与Darken-Manning关系。在5 GPa的H_2压力下于1301K时Au中的D * _(Fe)值是在没有H_2的5 GPa压力下在Au中的D * _(Fe)值的三倍,而前者是在0.1 l MPa的He压力下的D * _(Fe) 。在5 GPa的H_2压力下,Au中D * _(Fe)的温度依赖性可以表示为D * _(Fe)= 7.8 _(-5.6)〜(+20)x 10〜(-6)exp( -195 +-12kJmol〜(-1)/ RT)m〜2 s〜(-1)。尽管活化能仅比在0.1MPa的He中观察到的活化能大21kJmol-',但预指数因子几乎与在0.1MPa的He中的指数相等。该行为与γ-Fe的行为相反,γ-Fe在高压下具有很高的H_2溶解度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号