Ternary diffusion in the α and γ phases of the Fe-Ni-P system
Ternary diffusion in the α and γ phases of the Fe-Ni-P system
复制标题
Fe-Ni-P 系 α 相和 γ 相的三元扩散
DOI：
10.1007/bf02669372
复制
发表时间：
1973
期刊：
影响因子：
--
通讯作者：
J. Goldstein
中科院分区：
文献类型：
--
作者：
T. Heyward;J. Goldstein
在1200、1100、1000和900°C四个温度下测定了Fe-Ni-P系α-bcc和γ-fcc相的三元扩散系数。在1100°C下，α相中的DNiNiFe/DPPFe之比为0.3至0.4，交叉系数DPNiFe/DPPFe之比为0.03至0.05。在γ相中，相应的比率为0.01至0.02和0.0015至0.0025。由于实验的不确定性，不能评估其他交叉系数DNiPFe。用相互作用参数ε 12估算出α相中的DNiPFe/DNiNiFe比值为0.004 ~ 0.01，γ相中的为0.02 ~ 0.04。在α和γ相中加入P使主要的三元系数在一个温度下增加多达10倍。这与P降低三元体系中FeNi的熔点（高达500°C）的事实一致。在1100°C下获得的等扩散系数等值线大致平行于α和γ固相线边界，并且形状与α和γ固相线边界相似，作为温度的函数。在α和γ相中选定的成分下，计算DPPFe和DNiNiFe的活化能和D 0值，如下所示：
Ternary diffusion coefficients have been determined in the α-bcc and γ-fcc phases of the Fe-Ni-P system and at four temperatures 1200, 1100, 1000, and 900°C. At 1100°C the ratio ofDNiNiFe/DPPFein the α phase is 0.3 to 0.4 and the ratio of the cross coefficientDPNiFe/DPPFeis 0.03 to 0.05. m the γ phase the corresponding ratios are 0.01 to 0,02 and 0.0015 to 0.0025. The other cross coefficientDNiPFecould not be evaluated because of experimental uncertainties. Estimates of the ratioDNiPFe/DNiNiFeusing the interaction parameter ε12are 0.004 to 0.01 in the α phase and 0.02 to 0.04 in the γ phase. The addition of P in both the α and γ phase increases the major ternary coefficients up to as much as a factor of ten at one temperature. This is consistent with the fact that P lowers the melting point of FeNi in the ternary system, up to 500°C. Isodiffusion coefficient contours obtained at 1100°C plot approximately parallel to the α and γ solidus boundaries and are similar in shape to the α and γ solidus boundaries as a function of temperature. Activation energies andD0values were computed at selected compositions in both α and γ phases forDPPFeandDNiNiFeand are given below: