Premium
Microstructural aspects of Thermal Stress Resistance of high‐strength engineering ceramics Part II: Influence of microstructure on thermal shock resistance of high‐strength engineering ceramics
Author(s) -
Ziegler G.
Publication year - 1985
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.19850160206
Subject(s) - thermal shock , materials science , microstructure , ceramic , composite material , fracture (geology) , temperature cycling , shock (circulatory) , thermal , mechanical strength , thermodynamics , physics , medicine
In part I of this paper basic criteria for the improvement of thermal shock resistance of engineering ceramics were summarized. Moreover, data were presented about thermal shock resistance to fracture initiation and about thermal cycling behaviour of high‐strength engineering ceramics. In this part the influence of microstructure on thermal shock resistance to fracture initiation is discussed. This subject also includes the discussion of the influence of various microstructural variables on the mechanical and thermal properties which mainly control the thermal shock resistance to fracture initiation. These relations are demonstrated with Al 2 O 3 , but in particular by the example of dense and porous reactionbonded Si 3 N 4 . Furthermore, some other factors affecting thermal shock resistance are outlined: the influence of temperature dependence of properties on the microstructural effects on thermal shock resistance, and the influence of data scatter of the initial strength on the strength behaviour after thermal shock.