Aluminum nitride sintered body and method of evaluation for...

Details Aluminum nitride sintered body and method of evaluation for... Aluminum nitride sintered body and method of evaluation for...

2007-10-30

2007-10-30

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Refractory

C279S128000, C219S548000

Reexamination Certificate

active

10871351

ABSTRACT:
An aluminum nitride sintered body is provided, including a polycrystalline structure in which grain boundary fracture toughness KICgbis 1.6 MPa·m1/2or more. The grain boundary fracture toughness KICgbis determined by the equation KICgb=KIC·cos2(π·PIF/200), wherein KICis fracture toughness (MPa·m1/2), and PIF is a percentage of the intergranular fracture (%).

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