Microstructure and Mechanical Properties of HfC-SiC Ceramics Influenced by WC Addition

The development of HfC-SiC has been challenging due to difficulties in achieving sintering and satisfactory mechanical properties. However, this study aims to overcome these limitations by incorporating WC as an additive. SPS was employed to process HfC-SiC and HfC-SiC doped with 5 vol.% WC. The res...

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Main Authors: Yue Cheng, Huaguo Tang, Guangkai Fang, Yuan Yu, Lujie Wang, Yanfei Zhang, Zhuhui Qiao
Format: Article
Language:English
Published: MDPI AG 2023-04-01
Series:Materials
Subjects:
Online Access:https://www.mdpi.com/1996-1944/16/9/3337
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author Yue Cheng
Huaguo Tang
Guangkai Fang
Yuan Yu
Lujie Wang
Yanfei Zhang
Zhuhui Qiao
author_facet Yue Cheng
Huaguo Tang
Guangkai Fang
Yuan Yu
Lujie Wang
Yanfei Zhang
Zhuhui Qiao
author_sort Yue Cheng
collection DOAJ
description The development of HfC-SiC has been challenging due to difficulties in achieving sintering and satisfactory mechanical properties. However, this study aims to overcome these limitations by incorporating WC as an additive. SPS was employed to process HfC-SiC and HfC-SiC doped with 5 vol.% WC. The resulting samples were then evaluated for their oxygen content, relative density, Vickers hardness, bending strength, indentation fracture toughness, and microstructure. The Vickers hardness (20.50 ± 0.20 GPa), flexural strength (600.19 ± 84.00 MPa), and indentation fracture toughness (5.76 ± 0.54 MPa·m<sup>1/2</sup>) of HfC-30 vol.% SiC-5 vol.% WC ceramics are higher than HfC-30 vol.% SiC ceramics. Doping 5 vol.% WC in HfC-30 vol.% SiC not only reduces the oxygen content of samples but also produces the (Hf,W)C solid solution and refines the microstructures, which are the main reasons for the higher mechanical properties of HfC-30 vol.% SiC-5 vol.% WC ceramics. In summary, this study successfully addresses the challenges associated with HfC-SiC by incorporating WC as an additive, leading to improved mechanical properties and microstructures.
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spelling doaj.art-baeaebb275bd43b6998d4f76995182032023-11-17T23:14:43ZengMDPI AGMaterials1996-19442023-04-01169333710.3390/ma16093337Microstructure and Mechanical Properties of HfC-SiC Ceramics Influenced by WC AdditionYue Cheng0Huaguo Tang1Guangkai Fang2Yuan Yu3Lujie Wang4Yanfei Zhang5Zhuhui Qiao6School of Mechanical Engineering, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, ChinaShangdong Laboratory of Yantai Advanced Materials and Green Manufacture, Yantai 264006, ChinaSchool of Mechanical Engineering, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, ChinaYantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Yantai 264006, ChinaShangdong Laboratory of Yantai Advanced Materials and Green Manufacture, Yantai 264006, ChinaSchool of Mechanical Engineering, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, ChinaShangdong Laboratory of Yantai Advanced Materials and Green Manufacture, Yantai 264006, ChinaThe development of HfC-SiC has been challenging due to difficulties in achieving sintering and satisfactory mechanical properties. However, this study aims to overcome these limitations by incorporating WC as an additive. SPS was employed to process HfC-SiC and HfC-SiC doped with 5 vol.% WC. The resulting samples were then evaluated for their oxygen content, relative density, Vickers hardness, bending strength, indentation fracture toughness, and microstructure. The Vickers hardness (20.50 ± 0.20 GPa), flexural strength (600.19 ± 84.00 MPa), and indentation fracture toughness (5.76 ± 0.54 MPa·m<sup>1/2</sup>) of HfC-30 vol.% SiC-5 vol.% WC ceramics are higher than HfC-30 vol.% SiC ceramics. Doping 5 vol.% WC in HfC-30 vol.% SiC not only reduces the oxygen content of samples but also produces the (Hf,W)C solid solution and refines the microstructures, which are the main reasons for the higher mechanical properties of HfC-30 vol.% SiC-5 vol.% WC ceramics. In summary, this study successfully addresses the challenges associated with HfC-SiC by incorporating WC as an additive, leading to improved mechanical properties and microstructures.https://www.mdpi.com/1996-1944/16/9/3337HfC-SiC-WC ceramicssolid solutionmechanical propertiesSPS
spellingShingle Yue Cheng
Huaguo Tang
Guangkai Fang
Yuan Yu
Lujie Wang
Yanfei Zhang
Zhuhui Qiao
Microstructure and Mechanical Properties of HfC-SiC Ceramics Influenced by WC Addition
Materials
HfC-SiC-WC ceramics
solid solution
mechanical properties
SPS
title Microstructure and Mechanical Properties of HfC-SiC Ceramics Influenced by WC Addition
title_full Microstructure and Mechanical Properties of HfC-SiC Ceramics Influenced by WC Addition
title_fullStr Microstructure and Mechanical Properties of HfC-SiC Ceramics Influenced by WC Addition
title_full_unstemmed Microstructure and Mechanical Properties of HfC-SiC Ceramics Influenced by WC Addition
title_short Microstructure and Mechanical Properties of HfC-SiC Ceramics Influenced by WC Addition
title_sort microstructure and mechanical properties of hfc sic ceramics influenced by wc addition
topic HfC-SiC-WC ceramics
solid solution
mechanical properties
SPS
url https://www.mdpi.com/1996-1944/16/9/3337
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