THERMODYNAMIC STABILITY OF IRON NITRIDES AT TEMPERATURES BELOW 350-DEGREES-C

被引:32
作者
DEWIT, L
WEBER, T
CUSTER, JS
SARIS, FW
机构
[1] Foundation for Fundamental Research on Matter (FOM), Institute for Atomic and Molecular Physics, 1098 SJ Amsterdam
关键词
D O I
10.1103/PhysRevLett.72.3835
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Although iron nitride coatings are applied for their good tribological properties, their thermodynamic stabilities are unknown in the temperature range in which they are used. We have investigated the s and gamma' nitride phases between 0 and 350-degrees-C with ion implantation and find evidence that while the epsilon-Fe2N1-x with (1 - x) greater-than-or-equal-to 2/3 is stable, gamma'-Fe4N is not. At T less-than-or-equal-to 150-degrees-C, ion irradiation converts gamma'-Fe4N into epsilon-Fe2N1-x, with x -0.5. This epsilon nitride can then be transformed back into gamma'-Fe4N by annealing at temperatures of 150-degrees-C and higher. Ion irradiation assists this process as well.
引用
收藏
页码:3835 / 3838
页数:4
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