Model for electron-beam-induced crystallization of amorphous Me-Si-C (Me = Nb or Zr) thin films

被引:9
作者
Tengstrand, Olof [1 ]
Nedfors, Nils [2 ]
Andersson, Matilda [2 ]
Lu, Jun [1 ]
Jansson, Ulf [2 ]
Flink, Axel [1 ,3 ]
Eklund, Per [1 ]
Hultman, Lars [1 ]
机构
[1] Linkoping Univ, Dept Phys Chem & Biol IFM, Thin Film Phys Div, S-58183 Linkoping, Sweden
[2] Uppsala Univ, Angstrom Lab, Dept Chem, S-75121 Uppsala, Sweden
[3] Impact Coatings AB, S-58216 Linkoping, Sweden
关键词
MECHANICAL-PROPERTIES; TRIBOLOGICAL BEHAVIOR; METALLIC GLASSES; IRRADIATION; STABILITY; COATINGS; MICROSCOPY; ALLOYS; PHASE; TEM;
D O I
10.1557/jmr.2014.345
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We use transmission electron microscopy (TEM) for in situ studies of electron-beam-induced crystallization behavior in thin films of amorphous transition metal silicon carbides based on Zr (group 4 element) and Nb (group 5). Higher silicon content stabilized the amorphous structure while no effects of carbon were detected. Films with Nb start to crystallize at lower electron doses than the Zr-containing ones. During the crystallization, equiaxed MeC grains are formed in all samples with larger grains for ZrC (similar to 5 nm) compared to NbC (similar to 2 nm). The phenomenon of self-terminating crystallization at a dimension of 2-5 nm is explained by segregation of Si that is expelled from growing metal carbide grains into the surrounding amorphous phase matrix, which limits diffusion of the metal and carbon.
引用
收藏
页码:2854 / 2862
页数:9
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