Composite alumina/metal powders, cermets made from said powders, and processes of production
US5338714A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1992 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Mar 24, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S75/956
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to nano-composite powders of alumina and metal constituted of grains of micronic size. Each grain comprises a compact matrix of alumina of a specific surface area less than 5 m.sup.2 /g, in which are dispersed crystallites of transition metals of alloys of these metals, of sizes less than 50 nm. The powder according to the invention may be produced starting with a precursor comprised of a mixed carboxylic salt of aluminum and one or more transition metals. The powders according to the invention permit producing by sintering cermets of alumina/metal benefitting from greatly improved mechanical and thermo-mechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.