Hot Hardness Behavior of Yttrium Sialon Ceramics | Zendy

Ekström Thommy | Zendy; Persson Jeanette | Zendy

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Hot Hardness Behavior of Yttrium Sialon Ceramics

Author(s) -

Ekström Thommy,

Persson Jeanette

Publication year - 1990

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.1151-2916.1990.tb06683.x

Subject(s) - sialon , vickers hardness test , materials science , yttrium , ceramic , composite material , indentation hardness , phase (matter) , knoop hardness test , composite number , metallurgy , crystallite , mineralogy , microstructure , chemistry , organic chemistry , oxide

The hot hardness of polycrystalline single‐phase α‐ or β‐ sialon ceramics declines with increasing temperature, but the measured Vickers hardness (HV1) at 1100°C is still about 1550 and 1300 for the α‐sialon and the low‐substituted β‐sialon materials, respectively. The hardness of ‘composite’β‐ or α‐β‐sialon ceramics containing a high volume fraction of glassy phase is lower at all temperatures and drops significantly above about 900°C.

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