The effects of properties, microstructure and phase transformation on the erosion of hard materials

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dc.contributor.advisorBall, Anthonyen_ZA
dc.contributor.authorDoyle, Richard Alanen_ZA
dc.date.accessioned2016-09-25T16:10:53Z
dc.date.available2016-09-25T16:10:53Z
dc.date.issued1989en_ZA
dc.descriptionBaBibliography: pages 88-92.en_ZA
dc.description.abstractA variety of ceramic and ultrahard materials have been subjected to both solid particle and cavitation erosion. The materials tested include three grain sizes of alumina, stabilised zirconias, sialon, cubic boron nitride and polycrystalline diamond, and these have a range of microstructural, physical and mechanical properties. The damage modes are described for the two types of erosion and the results are critically discussed. It has been shown that different properties and microstructural features control the respective types of erosion. Hardness is the critical property which controls material loss during solid particle erosion. Cavitation erosion in contrast is less sensitive to hardness, but is extremely defect sensitive and preferentially attacks weak or damaged regions on the target. Grain size and shape, and th.e properties of the grain boundary or intergranular phase exert a strong influence on both types of erosion. It has in addition been concluded, that a propensity for a stress induced phase transformation, such as that exhibited by stabilised zirconia, will benefit the resistance of a ceramic to erosion. Ultrahard materials generally outperform the structural ceramics that were tested. While it was not possible to ascertain the effects of grain size conclusively, a large extent of intergrowth between the crystallites during manufacture appears to be beneficial to erosion resistance.en_ZA
dc.identifier.apacitationDoyle, R. A. (1989). <i>The effects of properties, microstructure and phase transformation on the erosion of hard materials</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering. Retrieved from http://hdl.handle.net/11427/21859en_ZA
dc.identifier.chicagocitationDoyle, Richard Alan. <i>"The effects of properties, microstructure and phase transformation on the erosion of hard materials."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1989. http://hdl.handle.net/11427/21859en_ZA
dc.identifier.citationDoyle, R. 1989. The effects of properties, microstructure and phase transformation on the erosion of hard materials. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Doyle, Richard Alan AB - A variety of ceramic and ultrahard materials have been subjected to both solid particle and cavitation erosion. The materials tested include three grain sizes of alumina, stabilised zirconias, sialon, cubic boron nitride and polycrystalline diamond, and these have a range of microstructural, physical and mechanical properties. The damage modes are described for the two types of erosion and the results are critically discussed. It has been shown that different properties and microstructural features control the respective types of erosion. Hardness is the critical property which controls material loss during solid particle erosion. Cavitation erosion in contrast is less sensitive to hardness, but is extremely defect sensitive and preferentially attacks weak or damaged regions on the target. Grain size and shape, and th.e properties of the grain boundary or intergranular phase exert a strong influence on both types of erosion. It has in addition been concluded, that a propensity for a stress induced phase transformation, such as that exhibited by stabilised zirconia, will benefit the resistance of a ceramic to erosion. Ultrahard materials generally outperform the structural ceramics that were tested. While it was not possible to ascertain the effects of grain size conclusively, a large extent of intergrowth between the crystallites during manufacture appears to be beneficial to erosion resistance. DA - 1989 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1989 T1 - The effects of properties, microstructure and phase transformation on the erosion of hard materials TI - The effects of properties, microstructure and phase transformation on the erosion of hard materials UR - http://hdl.handle.net/11427/21859 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21859
dc.identifier.vancouvercitationDoyle RA. The effects of properties, microstructure and phase transformation on the erosion of hard materials. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1989 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21859en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentCentre for Materials Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherHard materials - Testingen_ZA
dc.subject.otherMaterials Engineeringen_ZA
dc.titleThe effects of properties, microstructure and phase transformation on the erosion of hard materialsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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