ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The constitution of the ternary system Cr-Si-C is investigated using differential thermal analysis and X-ray diffractometry techniques. Eight invariant reaction temperatures involving the liquid phase are determined. The crystal structures and phase partitions observed for the subsolidus temperature region confirm literature data. Thermodynamic modeling, using a minimum of adjustable ternary parameters and assuming the binary high-temperature phase, β-Cr5Si3, to be stabilized toward lower temperatures as ternary D88-type Cr5Si3Cx, generally reproduces the measured temperatures within 10 K. The calculated liquidus surface contains four ternary eutectics, three transition reactions, three degenerated reactions, and five (pseudobinary eutectics) maxima. The reaction scheme shows that no solid-phase reactions occur in the Cr-Si-C system at 〉1000°C, except for the binary transition β-Cr5Si3↔α-Cr5Si3. The activity diagram along the section Cr-SiC at 1300°C, computed from the optimized data set, agrees with the observed diffusion path.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.2000.tb01513.x
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