ISSN:
1573-4870
Keywords:
Reaction mechanism
;
interfacial structure
;
ceramic-metal joint
;
vanadium carbide
;
vanadium silicide
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract SiC was bonded to SiC using V foil at temperatures ranging from 1473 K to 1673 K for 1.8 to 64.8 × 103 s and 30 MPa in vacuum. Interfacial reactions and microstructures were investigated using electron probe microanalyser and X-ray diffractometer. SiC begins to react with V at temperatures above 1473 K. Granular V2C phase was formed at the V side of the reaction zone, while a layer of V3Si phase was formed at the interface between V2C and SiC after bonding at 1573 K for 1.8 and 7.2 × 103 s. The same reaction structure can be observed at 1473 and 1673 K for 1.8 × 103 s. Hexagonal V5Si3Cx (X 〈 1) phase was formed at the interface between V3Si and SiC after bonding at 1573 K for 14.4 and 21.6 × 103 s, and the interface structure of the joint became SiC/V5Si3Cx/V3Si/V2C + V/V. This microstructure represents a complete diffusion path which is correlated with the corresponding Si-V-C phase diagram. At the longer bonding time of 64.8 × 103 s, V was completely consumed, and the joint showed the layer structure of SiC/V5Si3Cx/V3Si/V2C/V3Si/V5Si3Cx/SiC.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1021824821051
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