Fabrication of dense b-calcium orthophosphate with submicrometer-sized grains and its high-temperature superplastic deformation
MetadataShow full item record
High-density b-calcium orthophosphate (b-Ca3(PO4)2, also called b-tricalcium phosphate: b-TCP)ceramics with submicrometer-sized grains were fabricated using a pulse-current pressure firing route. The maximum relative density of the b-TCP compacts was 98.7% at 1050 C and this was accompanied by a translucent appearance. The mean grain size of the b-TCP compacts increased slightly with temperature to reach 0.78 lm at 1000 C. However, upon further increasing the firing temperature to 1050 C the mean grain size increased significantly to 1.6 lm. The extent of plastic deformation during tensile testing was examined at temperatures between 900 and 1100 C using a strain rate in the range 9.26 9 10-5 to 4.44 9 10-4 s-1. The maximum tensile strain achieved was 145% for a test temperature of 1000 C and strain rate of 1.48 9 10-4 s-1 and this was attributedto the relatively high density and small grain size.
Showing items related by title, author, creator and subject.
Constraining absolute deformation ages: The relationship between deformation mechanisms and isotope systematicsReddy, Steven; Potts, G. (1999)Isotope diffusion in a mineral is strongly temperature dependent but is also a function of grain size. Deformation must, therefore, be an important consideration in the interpretation of isotopic data because it provides ...
Pratapa, Suminar (2003)Crystallite (or grain) size and strain within a polycrystalline material may have a profound influence on its physical properties, eg. the fracture toughness, wear and thermal shock resistance. A diffraction pattern for ...
Dias de Oliveira, E.; Palta, J.; Bramley, H.; Stefanova, Katia; Siddique, K. (2015)© 2015 Dias de Oliveira, Palta, Bramley, Stefanova and Siddique. Elevated CO2 often increases grain yield in wheat by enhancing grain number per ear, which can result from an increase in the potential number of florets ...