Synthesis and properties of (Hf1-xTax) C solid solution carbides
Abstract Thermodynamically stable (Hf 1–x Ta x) C (x= 0.1–0.3) compositions were selected
by First Principle Calculation and synthesized in nanopowders via high-energy ball milling
and carbothermal reduction of commercial oxides at 1450° C. The formation of a solid
solution during powder synthesis was investigated. The solid solution carbide powders were
sintered at 1900° C by spark plasma sintering without a sintering aid. As a result, the (Hf 1–x
Ta x) C solid solution carbides exhibited high densities, excellent hardness and fracture …
by First Principle Calculation and synthesized in nanopowders via high-energy ball milling
and carbothermal reduction of commercial oxides at 1450° C. The formation of a solid
solution during powder synthesis was investigated. The solid solution carbide powders were
sintered at 1900° C by spark plasma sintering without a sintering aid. As a result, the (Hf 1–x
Ta x) C solid solution carbides exhibited high densities, excellent hardness and fracture …
Abstract
Thermodynamically stable (Hf1–xTax)C (x = 0.1–0.3) compositions were selected by First Principle Calculation and synthesized in nanopowders via high-energy ball milling and carbothermal reduction of commercial oxides at 1450 °C. The formation of a solid solution during powder synthesis was investigated. The solid solution carbide powders were sintered at 1900 °C by spark plasma sintering without a sintering aid. As a result, the (Hf1–xTax)C solid solution carbides exhibited high densities, excellent hardness and fracture toughness (ρ: 98.7–100.0%, HVN: 19.69–19.98 GPa, KIC: 5.09–5.15 MPa m1/2) compared with previously reported HfC and HfC–TaC solid solution carbides.
Elsevier
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