ISSN:
1662-9752
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:
Previous studies had shown that a promising material could be obtained by mixingaluminium-rich sludge with slate powder (with Al2O3:SiO2 molar proportion of 2:1), shaping byuniaxial pressing and sintering at 1300oC, in order both to detoxify the sludge by fixing the metalsin a leach-resistant ceramic matrix and to yield a new material from the reactions of the abovecompounds at high temperature. In view of potential applications, since this material was also foundto be inert after leaching tests, a further systematic study, reported in the present paper, was carriedout, in order to determine its mechanical properties and discuss them in function of themicrostructure. The average values of Vickers hardness HV3 (683), bend strength (126 MPa),Young's modulus (161GPa) and fracture toughness (3.35 MPa.m1/2) are significantly higher thanthose found for the as sintered slate powders, which is attributed to the increased fraction of α-alumina and reduced content of glassy phase in the microstructure of the material with sludgeaddition
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/12/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.514-516.1695.pdf
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