Preparation and interfacial layer microstructure of multilayer heterogeneous composite

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

5 Scopus Citations
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Author(s)

  • C. Wei
  • S.B. Zhang
  • C. Zheng
  • B. Peng
  • C. Li
  • Y. Zhang
  • X.Q. Li
  • L.F. Cheng

Detail(s)

Original languageEnglish
Article number110128
Journal / PublicationComposites Part B: Engineering
Volume243
Online published13 Jul 2022
Publication statusPublished - 15 Aug 2022

Abstract

The appropriate hetero interfacial layer structure between metal and ceramic matrix composites is a very interesting topic in materials science. In this work, an adaptive diffusion reactive interfacial layer composed of “Mo–Mo2C–Mo5Si3–MoSi2–SiC” between Mo and SiCf/SiC composite is successfully prepared by chemical vapor infiltration (CVI). This reactive interfacial system is among three possible structures of interfacial layers predicted by Density-functional theory (DFT) calculations, which has the largest total interfacial energy (5.679 J/m2). At the same time, the formation process of the reaction interface layers is elucidated by thermodynamic calculations. In addition, dislocations are observed in Mo5Si3 and Mo2C grains, and it is worth mentioning that the Mo5Si3 grains are broken through dislocation movement to form fine grains, which release the residual thermal stress of the interfacial layer system caused by thermal mismatch during the long-term CVI process. Overall, our work provides a practical strategy for developing multilayer heterogeneous composites.

Research Area(s)

  • Ceramic-matrix composites (CMCs), Interfacial microstructure, Multilayer, Nuclear, Refractory metals, Residual thermal stress

Citation Format(s)

Preparation and interfacial layer microstructure of multilayer heterogeneous composite. / Wei, C.; Zhang, S.B.; Wang, Z.W. et al.
In: Composites Part B: Engineering, Vol. 243, 110128, 15.08.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review