Aluminum nitride sintered body and method of evaluation for the same
US7288496B2 · kind B2 · utility
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6References
11Claims
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Key dates
| Filing date | Jun 18, 2004 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Aug 25, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/23
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An aluminum nitride sintered body is provided, including a polycrystalline structure in which grain boundary fracture toughness KICgb is 1.6 MPa·m1/2 or more. The grain boundary fracture toughness KICgb is determined by the equation KICgb=KIC·cos2(π·PIF/200), wherein KIC is fracture toughness (MPa·m1/2), and PIF is a percentage of the intergranular fracture (%).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.