THE INITIATION AND PROPAGATION OF HERTZIAN AND RADIAL CRACKS IN NICKEL-ZINC FERRITE

Persistent Link:
http://hdl.handle.net/10150/276523
Title:
THE INITIATION AND PROPAGATION OF HERTZIAN AND RADIAL CRACKS IN NICKEL-ZINC FERRITE
Author:
Neumann, James, 1958-
Issue Date:
1985
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
This investigation was initiated by IBM to determine the types of cracks formed in hot-isostatic-pressed (HIP) Ni-Zn ferrite under impact and static loading conditions. A 1/8-inch tungsten carbide (WC) ball was used to apply the load in both cases. The impact loading condition was accomplished by dropping the WC ball from various heights between 40 and 200 cm. The static loading condition was accomplished by applying loads of 10 kg, 15 kg, and 30 kg on a Rockwell Hardness Tester. The response of HIP Ni-Zn ferrite to impact and static loading was elastic/plastic yielding permanent indentations. "Dimple" impressions, Hertzian-ring cracks, and radial cracks were formed upon applying increasing loads to the HIP Ni-Zn ferrite. As the grain size of the material was increased, both the Hertzian-ring and radial cracks were formed at lower loads compared to the as-received samples. The "dimple" impressions were not observed to follow this trend.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Electronic ceramics -- Fracture.; Nickel alloys -- Brittleness.; Zinc alloys -- Brittleness.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Material Science and Engineering
Degree Grantor:
University of Arizona

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleTHE INITIATION AND PROPAGATION OF HERTZIAN AND RADIAL CRACKS IN NICKEL-ZINC FERRITEen_US
dc.creatorNeumann, James, 1958-en_US
dc.contributor.authorNeumann, James, 1958-en_US
dc.date.issued1985en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThis investigation was initiated by IBM to determine the types of cracks formed in hot-isostatic-pressed (HIP) Ni-Zn ferrite under impact and static loading conditions. A 1/8-inch tungsten carbide (WC) ball was used to apply the load in both cases. The impact loading condition was accomplished by dropping the WC ball from various heights between 40 and 200 cm. The static loading condition was accomplished by applying loads of 10 kg, 15 kg, and 30 kg on a Rockwell Hardness Tester. The response of HIP Ni-Zn ferrite to impact and static loading was elastic/plastic yielding permanent indentations. "Dimple" impressions, Hertzian-ring cracks, and radial cracks were formed upon applying increasing loads to the HIP Ni-Zn ferrite. As the grain size of the material was increased, both the Hertzian-ring and radial cracks were formed at lower loads compared to the as-received samples. The "dimple" impressions were not observed to follow this trend.en_US
dc.description.noteDigitization note: p. 25 missing from paper original.en
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectElectronic ceramics -- Fracture.en_US
dc.subjectNickel alloys -- Brittleness.en_US
dc.subjectZinc alloys -- Brittleness.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineMaterial Science and Engineeringen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.identifier.proquest1331719en_US
dc.identifier.oclc18213723en_US
dc.identifier.bibrecord.b16497259en_US
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