Advaed Ceramics Progrncess, Volume (4), No (3), Year (2018-8) , Pages (36-42)

Title : ( Crystallization Behavior and Mechanical Properties of In-situ Alumina-Zirconia Composite Bodies )

Authors: Pooneh Barfi sistani , Sahar Mollazadeh Beidokhti , Ali Reza Kiani Rashid ,

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Abstract

In-situ alumina-zirconia composite bodies were fabricated by heat treatment of gibbsite-zircon-kaolinite mixture at 1450℃. The current research investigated crystallization behavior and mechanical properties of the mentioned mixture in the presence of 5 wt.% MgO as an additive. X-ray diffraction (XRD) results showed that alumina, zirconia, and magnesium aluminosilicate were crystallized during the heat treatment at 1250-1550℃. It was expected that mullite and zirconia were crystallized as the final phases; however, the addition of 5 wt.% of MgO changed the behavior of the mentioned mixture during the heat treatment at 1250-1550℃. Energy diffractive X-Ray spectroscopy (EDS) reported that after heat treatment at 1450℃, an Al3+-rich aluminosilicate phase was formed as the matrix of the composite. Crystallization of alumina and zirconia and the existence of the amorphous aluminosilicate phase formed a composite with appropriate hardness and mechanical strength. The diametral tensile strength and Vickers microhardness values of the final composite were 130±7 MPa and 7.49 ± 1.2 GPa, respectively.

Keywords

Amorphous aluminosilicate phase
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@article{paperid:1076060,
author = {Barfi Sistani, Pooneh and Mollazadeh Beidokhti, Sahar and Kiani Rashid, Ali Reza},
title = {Crystallization Behavior and Mechanical Properties of In-situ Alumina-Zirconia Composite Bodies},
journal = {Advaed Ceramics Progrncess},
year = {2018},
volume = {4},
number = {3},
month = {August},
issn = {2423-7477},
pages = {36--42},
numpages = {6},
keywords = {Amorphous aluminosilicate phase},
}

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%0 Journal Article
%T Crystallization Behavior and Mechanical Properties of In-situ Alumina-Zirconia Composite Bodies
%A Barfi Sistani, Pooneh
%A Mollazadeh Beidokhti, Sahar
%A Kiani Rashid, Ali Reza
%J Advaed Ceramics Progrncess
%@ 2423-7477
%D 2018

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