Structural characterization and mechanical evaluation of bioactive glass 45S5 foams obtained by a powder technology approach

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DOIResolve DOI: http://doi.org/10.1111/j.1551-2916.2012.05465.x
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TypeArticle
Journal titleJournal of the American Ceramic Society
ISSN0002-7820
Volume95
Issue12
Pages37763780; # of pages: 5
SubjectBone ingrowth; Different structure; Foam structure; Glass particles; Mechanical evaluation; Mechanical points; Micro-structural; National Research Council; Open porosity; Polymer foams; Porous bodies; Powder Technology; Sintering temperatures; Solid structures; Structural characterization; Binders; Bioactive glass; Industrial research; Sintering; Sodium; Strength of materials
AbstractBioactive glass 45S5 foams were produced using a powder technology process developed by The National Research Council Canada-Industrial Materials Institute. NRC-IMI's proprietary process, combining powder technology and polymer foam technique, allows the production of materials having different structures and properties. It can be used to produce components into various forms, such as fully porous bodies or coatings on solid structures. During foaming, the foaming agent is decomposed and expands the binder-bioactive glass suspension. Then, the binder is burnt out by heating the sample at 500°C and finally the bioactive glass particle network is sintered to consolidate the material. Foams sintered at various temperatures were characterized from a microstructural and mechanical point of view. The foam structure and properties are affected by the sintering temperature when it is varied between 950°C and 1025°C. Foams exhibited open porosity (64%-79%) and pore size (335-530 μm) optimal for bone ingrowth. In all cases, the glass crystallized during sintering and the material was mostly composed of Na6Ca 3Si6O18 and Na2Ca 4(PO4)2SiO4 phases. The mechanical strength increased from 1.7 to 5.5 MPa while the density of the material increased from 0.56 to 0.97 g/cm3. © 2012 The American Ceramic Society.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute (IMI-IMI)
Peer reviewedYes
NPARC number21269288
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Record identifier909be4fe-9da5-4204-bc66-aa3c77051934
Record created2013-12-12
Record modified2016-05-09
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