A TEM study on the microstructure of spark plasma sintered ZrB2-based composite with nano-sized SiC dopant

作     者：Mehdi Shahedi Asl Abbas Sabahi Namini Seyed Ali Delbari Quyet Van Le Mohammadreza Shokouhimehr Mohsen Mohammadi Mehdi Shahedi Asl;Abbas Sabahi Namini;Seyed Ali Delbari;Quyet Van L;Mohammadreza Shokouhimehr;Mohsen Mohammadi

作者机构：Marine Additive Manufacturing Centre of Excellence (MAMCE) University of New Brunswick Department of Engineering Sciences Faculty of Advanced Technologies University of Mohaghegh Ardabili Department of Engineering Sciences Faculty of Advanced Technologies Sabalan University of Advanced Technologies (SUAT) Department of Materials Science and Engineering Research Institute of Advanced Materials Seoul National University Institute of Research and Development Duy Tan University 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2021年第31卷第1期

页      面：47-54页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：funding received from Natural Sciences and Engineering Research Council of Canada (NSERC)Grant No. RGPIN-2016-04221 the McCain Foundation for providing enough funding through the Mc Cain Foundation Postdoctoral Fellowship in Innovation program to conduct this work fund of the Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 104.05-2020.15 

主　　题：Spark plasma sintering ZrB2 Nano-sized SiC Glassy phases 

摘      要：Sintering behavior of ZrB2ceramic with nano-sized SiC dopant was studied. ZrB2-25 vol% nano-sized SiC was selected as the starting mixture to fabricate the composite. The manufacturing process was accomplished at 1800℃ for 5 min under 25 MPa via spark plasma sintering（SPS）. The as-sintered sample reached a relative density of 99%. Besides the initial phases, namely ZrB2and SiC, the high-resolution X-ray diffraction（HRXRD） was used to study the formation of an in-situ ZrC phase. The possible chemical interactions during the ZrC phase formation were scrutinized. The microstructure of the composite was studied by the field emission scanning electron microscopy（FESEM） and transmission electron microscopy（TEM）. Elemental analysis through FESEM evaluations revealed the formation of amorphous phases, rich in Zr, C, Si, B, and O elements, which was in harmony with the thermodynamical assessments. TEM studies endorsed the formation of such phases, containing a glassy bed of Si–B–O with ZrC and C islands dispersed therein.