Elastic diffuse neutron scattering study of the defect structure of TiC<sub>0.76</sub> and NbC<sub>0.73</sub>期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Elastic diffuse neutron scattering study of the defect structure of TiC_0.76 and NbC_0.73

Authors:	V Moisy-Maurice CH de Novion AN Christensen W Just

Institution:	SESI, CEN, BP 6, 92260 Fontenay-aux-Roses, France;Department of Chemistry, Aarhus University, Aarhus, Denmark;ILL, 156 X Centre de Tri, 38042 Grenoble Cedex, France

Abstract:	The elastic diffuse neutron scattering of the non-stoichiometric carbides TiC_0.76 and NbC_0.73 has been measured at room temperature, in the (110) reciprocal lattice plane, for $0.2?q = 4π sin O/λ?4 A ?^{-1}$ . The Cowley-Waren short-range order parameters were obtained for the eight first shells of neighbours of the metalloid f.c.c. sublattice. The degree of short-range ordering was found much larger in NbC_0.76. Strong displacements of the metal atoms towards their first neighbour carbons occur in both cases.

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