Cermet having improved toughness and method for manufacturing the same
AssigneeSeoul National University R&Db Foundation
InventorsShinhoo Kang, Heung Nam Han, Choongkwon Park, Nojun Kwak
Life of this patent
Estimating the term…
Abstract
Provided is a cermet having improved toughness, the cermet including particles each of which has a complete solid-solution carbide of two or more metals selected, including titanium, from among Group IVa, Va, and VIa metals in the periodic table and has a core/rim structure composed of a core region and a rim region, and a binder composed of a metal, wherein the composition of the Group VIa metal in the core region is lower than the composition in the rim region, and the lattice constant in the rim region is larger than that in the core region.
Claims4
A cermet comprising:
- particles, each of which has a complete solid solution of TiC and WC which is made from TiO2, WO3, and graphite, and has a core/rim structure composed of a core region and a rim region, and has a face centered cubic structure;
- and
- a binder composed of a metal,
- wherein an amount of W in the core region is lower than an amount of W in the rim region,
- wherein an amount of W in an interface between the core region and the rim region is gradually increased from the core region to the rim region, and
- wherein a lattice constant in the rim region is larger than that in the core region.
Dependencies are inferred from the claim text.