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Preparation of mullite-TiB2-CNTs hybrid composite through spark plasma sintering
, Article Ceramics International ; Volume 45, Issue 13 , 2019 , Pages 16288-16296 ; 02728842 (ISSN) ; Ghasali, E ; Moradi, M ; Derakhshandeh, M. R ; Alizadeh, M ; Shahedi Asl, M ; Ebadzadeh, T ; Sharif University of Technology
Elsevier Ltd
2019
Abstract
A near fully dense mullite-TiB2-CNTs hybrid composite was prepared successfully trough spark plasma sintering. 1 wt%CNT and 10 wt%TiB2 were mixed with nano-sized mullite powders using a high energy mixer mill. Spark plasma sintering was carried out at 1350 °C under the primary and final pressure of 10 MPa and 30 MPa, respectively. XRD results showed mullite and TiB2 as dominant crystalline phases accompanied by tiny peaks of alumina. The microstructure of prepared composites demonstrated uniform distribution of TiB2 reinforcements in mullite matrix without any pores and porosities as a result of near fully densified spark plasma sintered composite. The fracture surface of composite revealed...