Combined role of SiC whiskers and graphene nano-platelets on the microstructure of spark plasma sintered ZrB2 ceramics

被引：17

作者：

Van-Huy Nguyen ^{[1
,2
]}

Delbari, Seyed Ali ^{[3
]}

Asl, Mehdi Shahedi ^{[4
]}

Quyet Van Le ^{[5
]}

Namini, Abbas Sabahi ^{[6
,7
]}

Ahmadi, Zohre ^{[3
]}

Farvizi, Mohammad ^{[8
]}

Mohammadi, Mohsen ^{[4
]}

Shokouhimehr, Mohammadreza ^{[3
]}

机构：

[1] Ton Duc Thang Univ, Dept Management Sci & Technol Dev, Ho Chi Minh City, Vietnam

[2] Ton Duc Thang Univ, Fac Appl Sci, Ho Chi Minh City, Vietnam

[3] Seoul Natl Univ, Res Inst Adv Mat, Dept Mat Sci & Engn, Seoul 08826, South Korea

[4] Univ New Brunswick, Marine Addit Mfg Ctr Excellence MAMCE, Fredericton, NB E3B 5A1, Canada

[5] Duy Tan Univ, Inst Res & Dev, Da Nang 550000, Vietnam

[6] Univ Mohaghegh Ardabili, Fac Adv Technol, Dept Engn Sci, Namin, Iran

[7] Sabalan Univ Adv Technol SUAT, Fac Adv Technol, Dept Engn Sci, Namin, Iran

[8] Mat & Energy Res Ctr MERC, Ceram Dept, Karaj, Iran

来源：

CERAMICS INTERNATIONAL | 2021年 / 47卷 / 09期

基金：

新加坡国家研究基金会; 加拿大自然科学与工程研究理事会;

关键词：

ZrB2; SiC whisker; Graphene; Spark plasma sintering; Nanostructure; DENSIFICATION; SENSOR; NANOCOMPOSITE; OPTIMIZATION; DASATINIB; DESIGN; POWDER;

D O I：

10.1016/j.ceramint.2021.01.103

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：

This research explores the sintering behavior and microstructure of ZrB2-based materials containing graphene nano-platelets (GNPs) and SiC whiskers (SiCw). Spark plasma sintering (SPS) process at 1900 degrees C was implemented to sinter the specimen, leading to a composite with 100% relative density. High-resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), field emission-electron probe microanalyzer (FE-EPMA), and high-resolution X-ray diffractometry (HRXRD) were employed to study the SPSed sample, along with the thermodynamics predictions. According to the HRXRD result and microstructural observations, the sintering process was non-reactive, which was endorsed with the XPS analysis. Furthermore, graphene presented a beneficial role for eradicating the oxide impurities in the sample during the sintering. Such oxide impurities were reduced to the original phases of SiC and ZrB2, contributing to porosity removal. Nanostructural investigations revealed the formation of ultrathin amorphous interfaces (similar to 10 nm) between ZrB2/graphene phases, disordered atomic planes in graphene platelets, and dislocations in ZrB2 grains. One reason for generating crystalline defects in the microstructure was found out to be the mismatches amongst the elastic properties of the available compounds in the system.

引用

页码：12459 / 12466

页数：8

共 54 条

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