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X-ray diffraction layer-by-layer analysis of tungsten carbide-based hard alloys
- Source :
- Industrial laboratory. Diagnostics of materials. 86:38-42
- Publication Year :
- 2020
- Publisher :
- TEST-ZL Publishing, 2020.
-
Abstract
- Improvement of the physical and mechanical properties of hard alloys based on WC – Co widely used in manufacturing of structural and tool products nowadays results from the use of novel technologies providing formation of a homogeneous high-density structures. Slight deviations of the carbon content from the equilibrium state lead to the formation of brittle η-phases (in particular, Co3W3C) and, accordingly, to deterioration of the mechanical properties of the product. We present the results of studying the homogeneity of the phase composition of the samples of hard alloys WC + 10% Co, obtained using advanced technologies of plasma-chemical synthesis and spark plasma sintering (SPS). The layer-by-layer X-ray phase analysis revealed the heterogeneity of the phase composition in depth: the brittle η-phase (Co3W3C) appears at a depth of ≥100 μm and reaches a constant value of 18 ± 1 wt.% at >200 μm, which indirectly confirms the hypothesis of carbon diffusion from graphite punches contacting with the surface of sintered samples and makes it possible to expand the range of parameters affecting the process of spark plasma sintering.
- Subjects :
- 010302 applied physics
Materials science
Thermodynamic equilibrium
Metallurgy
Spark plasma sintering
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
chemistry.chemical_compound
Brittleness
chemistry
Tungsten carbide
Phase composition
0103 physical sciences
Homogeneity (physics)
Graphite
0210 nano-technology
Phase analysis
Subjects
Details
- ISSN :
- 25880187 and 10286861
- Volume :
- 86
- Database :
- OpenAIRE
- Journal :
- Industrial laboratory. Diagnostics of materials
- Accession number :
- edsair.doi...........8fd4b77f1ad22f5bebef7bc8df7412d5