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Effect of Wear Damage on the Strength of Hot Isostatically Pressed Silicon Nitride
Author(s) -
Wang Zhiping,
Ruiz Carlos
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb06277.x
Subject(s) - materials science , silicon nitride , cracking , metallurgy , silicon , flexural strength , bending , weibull distribution , composite material , nitride , turbine blade , turbine , layer (electronics) , mechanical engineering , statistics , mathematics , engineering
Bending tests have been used to characterize the effect of wear damage of hot isostatically pressed silicon nitride in contact with waspaloy at 600°C. The problem arises at the junction between turbine blades and disks where wear may result in premature fatigue cracking of the blade root. The tests show that wear always results in a reduction of strength, whereas the Weibull modulus may decrease or remain unchanged, depending on the amount of surface damage.