ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A novel rapid prototyping manufacturing technology for glass-alumina functionally gradientmaterials (G-A FGMs) based on the quick solidification of wax was proposed. The feature of thetechnology came from its layer-by-layer fabrication of the wax-glass/alumina composite layer carved inaccordance with the shape of each layer of the computer designed model and in situ casting of wax intothe carved area. Removal of the wax in the G-A FGMs green body was investigated based on differentialscanning calorimetry (DSC) analysis. Sintering properties of the G-A FGMs were discussed. Bendingstrength of the G-A FGMs was measured by a three-point flexural test. Microstructures of the preparedG-A FGMs were observed using environmental scanning electron microscope (ESEM) and thecompositional distribution was determined according to energy dispersive spectrum (EDS). Sampleswere preliminarily and respectively held at 200ºC and 300ºC for a long time based on the DSC analysis.The range of the optimal sintering temperature is determined to be from 710ºC to 720ºC and the holdingtime is 30min. With the increasing alumina content, the bending strength increases and the maximumbending strength is 67.5MPa. There is no delamination of the G-A FGMs via ESEM. Homogeneousdistribution of the ingredient materials is confirmed through EDS
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1828.pdf
