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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on NbCr2 by Materials Project

Cr2Nb is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Nb is bonded in a 12-coordinate geometry to four equivalent Nb and twelve equivalent Cr atoms. All Nb–Nb bond lengths are 3.01 Å. All Nb–Cr bond lengths are 2.88 Å. Cr is bonded to six equivalent Nb and six equivalent Cr atoms to form a mixture of edge, face, and corner-sharing CrNb6Cr6 cuboctahedra. All Cr–Cr bond lengths are 2.46 Å.

36 MATERIALS SCIENCE↗
NASA NTRS1990

Intermetallic matrix composites; Proceedings of the MRS Symposium, San Francisco, CA, Apr. 18-20, 1990

The present volume on intermetallic matrix composites discusses the modeling, processing, microstructure/property relationships, and compatibility of intermetallic matrix composites. Attention is given to models for the strength of ductile matrix composites, innovative processing techniques for intermetallic matrix composites, ductile phase toughening of brittle intermetallics, and reactive synthesis of NbAl3 matrix composites. Topics addressed include solidification processing of NbCr2 alloys, Ta and Nb reinforced MoSi2, the microstructure and mechanical behavior of Ni3Al-matrix composites, and ductile-phase toughening of Cr3Si with chromium. Also discussed are dislocation morphologies in TiB2/NiAl, the development of highly impact resistant NiAl matrix composites, the effect of notches on the fatigue life of the SCS-6Ti3Al composite, and the chemical stability of fiber-metal matrix composites.

Anton, D. L.↗