A study of the effect of the ion exchange method of chemical tempering on a macroflaw in soda-lime glass.

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dc.contributor.advisorLeonesio, Robert B.
dc.contributor.authorLiedmandt, Michael Jerome
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentOceanography
dc.contributor.secondreaderThornton, Edward B.
dc.dateSeptember 1971
dc.date.accessioned2012-11-13T23:25:28Z
dc.date.available2012-11-13T23:25:28Z
dc.date.issued1971-09
dc.description.abstractIn recent years much research has gone into determining the behavior of glass which makes it adaptable for structural use in submersible vehicles and for oceanographic instrumentation packages. This work examines the strengthening effect of the ion exchange method of chemical tempering on a macroflaw in glass. Use of a macroflaw allows a quantitative fracture mechanics analysis of the amount of strengthening. Precracked soda-lime glass specimens were treated for various lengths of time in a potassium nitrate salt bath held at 365°C. The behavior of the macroflaw while being treated and at fracture was closely observed. The strain energy release rale, G(c) , and the fracture toughness, K(c), were found by using the double cantilever cleavage technique of measuring fracture surface energies. The average strengthening which occurred at this temperature was found to be almost linear with time with a maximum increase of G(c) of approximately 300 per cent at twenty-four hours. The diffusion of ions was determined to be inward from the sides of the flaw rather than across the entire flaw tip.
dc.description.distributionstatementApproved for public release; distribution is unlimited.
dc.description.serviceLieutenant, United States Navy
dc.description.urihttp://archive.org/details/astudyofeffectof1094515918
dc.identifier.urihttps://hdl.handle.net/10945/15918
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
dc.subject.authorstrengthening of glassen_US
dc.subject.authorion exchange tempering of glassen_US
dc.subject.authordouble cantilever cleavage of glassen_US
dc.subject.authorglass tempering and fractureen_US
dc.subject.authorfracture of glassen_US
dc.subject.lcshOceanographyen_US
dc.titleA study of the effect of the ion exchange method of chemical tempering on a macroflaw in soda-lime glass.en_US
dc.typeThesisen_US
dspace.entity.typePublication
etd.thesisdegree.disciplineOceanographyen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.nameM.S. in Oceanographyen_US
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