Alumina core having a high degree of porosity and crushability characteristics
US4164424A · kind A · utility
31Cited by
7References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 6, 1977 |
| Grant date | Aug 14, 1979 |
| Priority date | — |
| Expiry date | Oct 6, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A core for investment casting directionally solidified eutectic and superalloy material consists of alumina which has a porous microstructure in which the grain morphology is characteristic of grains which have undergone vapor phase transport action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.