{112} 〈111〉 twins in tetragonal MoSi2
- 1 June 1992
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 65 (6) , 1339-1351
- https://doi.org/10.1080/01418619208205608
Abstract
Plasma-sprayed tetragonal MoSi2 has been examined by transmission electron microscopy. Growth twins are commonly observed in the microstructure. Analysis of diffraction patterns using a stereographic projection indicates that the twinning plane is {112} and the twinning direction is 〈111〉. Atomic modelling of the twin interface shows that a key element is the pseudo-hexagonal nature of the MoSi2{110} planes which allows a ∑2 coincidence site relationship between matrix and twin. The habit plane for the twins is commonly observed to be {110}, implying that the plane corresponds to a twist boundary. The rotation angle is almost exactly 60°. It is likely that the twins result from the hexagonal-to-tetragonal transformation of MoSi2 at high temperatures.Keywords
This publication has 5 references indexed in Scilit:
- Single Crystal Growth and Mechanical Properties of MoSi2 and WSi2Published by Wiley ,1991
- High temperature deformation of MoSi2 single crystals with the C11b structureActa Metallurgica et Materialia, 1990
- Dislocations and Plastic Deformation In Molybdenum DisilicideJournal of the American Ceramic Society, 1990
- High temperature deformation behaviour of MoSi2 and WSi2 single crystalsJournal of Materials Science, 1990
- Planar faults in MoSi2single crystals deformed at high temperaturesPhilosophical Magazine Letters, 1989