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Fracture Toughness of Spray‐Dried Powder Compacts
Author(s) -
Zhang Zhiye,
Green David J.
Publication year - 2002
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.1151-2916.2002.tb00273.x
Subject(s) - materials science , fracture toughness , composite material , ultimate tensile strength , compaction , toughness , fracture (geology)
The strengths and fracture toughness values were measured for alumina powder compacts containing two different binder systems. Diametral compression was used to measure both the tensile strength and the fracture toughness (through‐thickness notch). This methodology was very useful in linking processing parameters, such as binder choice and compaction stress, to the quality of the green bodies. Observations of the compact structure before and after fracture showed that the binders segregated to the region between the spray‐dried granules. The presence of the excess binder in this region was linked to both the failure mode and the creation of secondary cracks.