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High temperature powder neutron diffraction studies of structural transformations in transition metal hemicarbides M2C1−x: I. Compounds of the Vth group (V2C, Nb2C, Ta2C)

✍ Scribed by T. Epicier; P. Convert

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
263 KB
Volume
156-157
Category
Article
ISSN
0921-4526

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✦ Synopsis

The crystal chemistry of the metallic hemicarbides V,C, Nb,C, Ta,C and MO& W,C has been re-examined by in situ neutron diffraction up to 2200°C. The results concerning ordered modifications and structural transformations are reported in 2 parts, devoted to the compounds of the Vth and VIth groups respectively.

📜 SIMILAR VOLUMES

High temperature powder neutron diffract
High temperature powder neutron diffraction studies of structural transformations in transition metal hemicarbides M2C1−x: II. Compounds of the VIth group (Mo2C1−x and W2C1−x
✍ T. Epicier; J. Dubois; C. Esnouf; G. Fantozzi; P. Convert 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 218 KB

This second part is devoted to the hemicarbides of the VIth transition metal group (Mo,C and W?C); a new structural transformation <-+ (E-type) is identified in Mo,C,\_, compounds, while this transition is confirmed in W,C.

Neutron powder diffraction studies of tr
Neutron powder diffraction studies of transition metal hemicarbides M2C1−x—I. Motivation for a study on W2C and Mo2C and experimental background for an in situ investigation at elevated temperature
✍ J Dubois; T Epicier; C Esnouf; G Fantozzi; P Convert 📂 Article 📅 1988 🏛 Elsevier Science ⚖ 896 KB

The crystallography of hexagonal hemicarbides of the sixth group transition metals (Mo2C, W2C) has been investigated by many workers, and an up to date review is presented herein (Section 1); it appears that controversies concerning the various ordered structures (i.e. C6, ~-Fe2N and (-Fe, N-type ph