Ceramic-metal composite and method to form said composite
US6296045A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1998 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Aug 12, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12007
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A ceramic-metal composite that is tough and stiff has been prepared and is comprised of an inert ceramic (e.g., alumina) embedded and dispersed in a matrix comprised of a metal (e.g., aluminum), a reactive ceramic (e.g., boron carbide) and a reactive ceramic-metal reaction product (e.g., AlB.sub.2, Al.sub.4 BC, Al.sub.3 B.sub.48 C.sub.2, AlB.sub.12, Al.sub.4 C.sub.3, AlB.sub.24 C.sub.4 or mixtures thereof) wherein grains of the inert ceramic have an average grain size greater than or equal to the average grain size of grains of the reactive ceramic. The ceramic-metal composite may be prepared by forming a mixture comprised of an inert ceramic powder (e.g., alumina) and a reactive ceramic powder (e.g., boron carbide), the inert ceramic powder having an average particle size equal to or greater than the average particle size of the reactive ceramic powder, forming the mixture into a porous body and consolidating the porous body in the presence of a metal (e.g., aluminum) to form the ceramic-metal composite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.