Co-reinforcing of mullite-TiN-CNT composites with ZrB2 and TiB2 compounds

被引：152
作者：
Orooji, Yasin [1 ]
Alizadeh, As'ad [2 ]
Ghasali, Ehsan [3 ]
Deraldishandeh, Mohammad Reza [3 ]
Alizadeh, Masoud [3 ]
Asl, Mehdi Shahedi [4 ]
Ebadzadeh, Touradj [3 ]
机构：
[1] Nanjing Forestry Univ, Coll Mat Sci & Engn, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China
[2] Univ Zakho, Dept Mech Engn, Coll Engn, Zakho City, Iraq
[3] Mat & Energy Res Ctr, Ceram Dept, Alborz, Iran
[4] Univ Mohaghegh Ardabili, Dept Mech Engn, Ardebil, Iran
来源：
CERAMICS INTERNATIONAL | 2019年 / 45卷 / 16期
关键词：
Mullite; CNT; Composite; Microstructure; Spark plasma sintering; METAL-MATRIX COMPOSITE; SPARK-PLASMA; MECHANICAL-PROPERTIES; MICROSTRUCTURE; TEMPERATURE; DENSIFICATION; MICROWAVE; BEHAVIOR; PERFORMANCE; PARAMETERS;
D O I：
10.1016/j.ceramint.2019.07.072
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, the microstructural and mechanical properties of three different mullite matrix composites were investigated. Accordingly, Mullite-TiN-CNT, Mullite-TiN-TiB2-CNT and Mullite-TiN-TiB2-ZrB2-CNT composites with 10 wt % of each TiN, TiB2 and ZrB2 reinforcement particles as well as 1 wt % CNT were prepared by the spark plasma sintering (SPS) technique. The sintering processes were conducted at 1350 degrees C for 5 min with a mean heating rate of 60 degrees C/rnin. The relative densities of the composites achieved were higher than 97% of theoretical density. The results of mechanical properties of the fabricated composites showed that Mul-TiN-TiB2-ZrB2-CNT composites obtained the highest hardness and fracture toughness values. XRD results confirmed the presence of mullite, TiN, TiB2 and ZrB2 phases without any additional reactions between reinforcement and matrix phases. Microstructural studies demonstrated the uniform distribution of reinforcing phases in the matrix for all composites. The fracture surface micrographs revealed the dominating transgranular fracture mode indicated the strong adhesion of the reinforcing particles to the matrix. Pulling out of CNTs was also observed in the fracture surface of composites, which plays a vital role in the fracture energy absorption and joining of interfaces.
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页码：20844 / 20854
页数：11
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