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- W19612353 abstract "The mechanism of the phenomena caused by rapid, cyclic heat treatment of solids was investigated to confirm experimentally previously derived theoretical deductions. According to this theory the thermally-induced stresses result either in alternating compression and elongation of the system leading to the reduction of the contact surface between components and to lower density, or to the formation of residual compression stresses of the order of 2 to 20 kg/cm/sup 2/ which cause increased contact and higher density. As a 1% change of the density corresponds to 3 to 15% change of the contact surface, instead of dilatometric or pycnometric methods a method based on the contact surface, namely electric resistance measurement, was used. This method presents the advantages of being non-destruc- tive and easily reproducible. Graphite and solid oxide mixtures were used for the tests. Results confirmed the expectations: the cyclic heat treatment increased the resistance but in case of microporous specimens the resistance was considerably reduced, presenting an example of sintering and self- healing of defects. It was found that the heat resistance depends not only on the physical properties of the components but also on the shape and dimension of the test specimens. (TTT)" @default.
- W19612353 created "2016-06-24" @default.
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- W19612353 date "1961-05-01" @default.
- W19612353 modified "2023-09-27" @default.
- W19612353 title "HEAT RESISTANCE PROBLEMS" @default.
- W19612353 hasPublicationYear "1961" @default.
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