Effect of Pre-Oxidation Treatment of Nano-SiC Particulates on Microstructure and Mechanical Properties of SiC/Mg-8Al-1Sn Composites Fabricated by Powder Metallurgy Combined with Hot Extrusion

Nano-SiC particulates (n-SiCp) reinforced Mg-8Al-1Sn (AT81) composites with different pre-oxidation parameters were fabricated by powder metallurgy (P/M) process combined with hot extrusion. The effects of pre-oxidization treatment of n-SiCp on the microstructure and tensile properties of 0.5 vol %...

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Main Authors: Chuan-Peng Li, Zhi-Guo Wang, Min Zha, Cheng Wang, Hong-Chen Yu, Hui-Yuan Wang, Qi-Chuan Jiang
Format: Article
Language:English
Published: MDPI AG 2016-11-01
Series:Materials
Subjects:
Online Access:http://www.mdpi.com/1996-1944/9/12/964
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spelling doaj-f27d99f78479400aaf04e4e6222923032020-11-24T21:23:17ZengMDPI AGMaterials1996-19442016-11-0191296410.3390/ma9120964ma9120964Effect of Pre-Oxidation Treatment of Nano-SiC Particulates on Microstructure and Mechanical Properties of SiC/Mg-8Al-1Sn Composites Fabricated by Powder Metallurgy Combined with Hot ExtrusionChuan-Peng Li0Zhi-Guo Wang1Min Zha2Cheng Wang3Hong-Chen Yu4Hui-Yuan Wang5Qi-Chuan Jiang6State Key Laboratory of Automotive Simulation and Control, Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, ChinaState Key Laboratory of Automotive Simulation and Control, Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, ChinaState Key Laboratory of Automotive Simulation and Control, Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, ChinaState Key Laboratory of Automotive Simulation and Control, Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, ChinaState Key Laboratory of Automotive Simulation and Control, Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, ChinaState Key Laboratory of Automotive Simulation and Control, Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, ChinaState Key Laboratory of Automotive Simulation and Control, Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, ChinaNano-SiC particulates (n-SiCp) reinforced Mg-8Al-1Sn (AT81) composites with different pre-oxidation parameters were fabricated by powder metallurgy (P/M) process combined with hot extrusion. The effects of pre-oxidization treatment of n-SiCp on the microstructure and tensile properties of 0.5 vol % n-SiCp/AT81 composites were investigated accordingly. The distribution of n-SiCp with different pre-oxidation parameters was homogeneous in the composites. Moreover, it was found that a thin MgAl2O4 layer formed at the interface when the n-SiCp were pre-oxidized at 1073 K for 2 h, while the MgAl2O4 layer became much thicker with pre-oxidization temperature increasing to 1273 K for 2 h. After an appropriate pre-oxidization treatment of n-SiCp at 1073 K for 2 h, the as-extruded 0.5 vol % n-SiCp/AT81 composites exhibited an enhanced strength. It was found that the yield strength (YS) and ultimate tensile strength (UTS) increased from 168 MPa and 311 MPa to 255 MPa and 393 MPa compared with the as-extruded AT81 alloy, reflecting 51.8% and 26.4% increments, respectively. The improvement of mechanical properties should be mainly attributed to the grain refinement and homogeneous distribution of n-SiCp in the composites. Moreover, a well-bonded interface and the formation of an appropriate amount of interfacial product (MgAl2O4) benefited the material’s mechanical properties.http://www.mdpi.com/1996-1944/9/12/964magnesiumnano-SiC particulatespre-oxidation parameterspowder metallurgytensile properties
collection DOAJ
language English
format Article
sources DOAJ
author Chuan-Peng Li
Zhi-Guo Wang
Min Zha
Cheng Wang
Hong-Chen Yu
Hui-Yuan Wang
Qi-Chuan Jiang
spellingShingle Chuan-Peng Li
Zhi-Guo Wang
Min Zha
Cheng Wang
Hong-Chen Yu
Hui-Yuan Wang
Qi-Chuan Jiang
Effect of Pre-Oxidation Treatment of Nano-SiC Particulates on Microstructure and Mechanical Properties of SiC/Mg-8Al-1Sn Composites Fabricated by Powder Metallurgy Combined with Hot Extrusion
Materials
magnesium
nano-SiC particulates
pre-oxidation parameters
powder metallurgy
tensile properties
author_facet Chuan-Peng Li
Zhi-Guo Wang
Min Zha
Cheng Wang
Hong-Chen Yu
Hui-Yuan Wang
Qi-Chuan Jiang
author_sort Chuan-Peng Li
title Effect of Pre-Oxidation Treatment of Nano-SiC Particulates on Microstructure and Mechanical Properties of SiC/Mg-8Al-1Sn Composites Fabricated by Powder Metallurgy Combined with Hot Extrusion
title_short Effect of Pre-Oxidation Treatment of Nano-SiC Particulates on Microstructure and Mechanical Properties of SiC/Mg-8Al-1Sn Composites Fabricated by Powder Metallurgy Combined with Hot Extrusion
title_full Effect of Pre-Oxidation Treatment of Nano-SiC Particulates on Microstructure and Mechanical Properties of SiC/Mg-8Al-1Sn Composites Fabricated by Powder Metallurgy Combined with Hot Extrusion
title_fullStr Effect of Pre-Oxidation Treatment of Nano-SiC Particulates on Microstructure and Mechanical Properties of SiC/Mg-8Al-1Sn Composites Fabricated by Powder Metallurgy Combined with Hot Extrusion
title_full_unstemmed Effect of Pre-Oxidation Treatment of Nano-SiC Particulates on Microstructure and Mechanical Properties of SiC/Mg-8Al-1Sn Composites Fabricated by Powder Metallurgy Combined with Hot Extrusion
title_sort effect of pre-oxidation treatment of nano-sic particulates on microstructure and mechanical properties of sic/mg-8al-1sn composites fabricated by powder metallurgy combined with hot extrusion
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2016-11-01
description Nano-SiC particulates (n-SiCp) reinforced Mg-8Al-1Sn (AT81) composites with different pre-oxidation parameters were fabricated by powder metallurgy (P/M) process combined with hot extrusion. The effects of pre-oxidization treatment of n-SiCp on the microstructure and tensile properties of 0.5 vol % n-SiCp/AT81 composites were investigated accordingly. The distribution of n-SiCp with different pre-oxidation parameters was homogeneous in the composites. Moreover, it was found that a thin MgAl2O4 layer formed at the interface when the n-SiCp were pre-oxidized at 1073 K for 2 h, while the MgAl2O4 layer became much thicker with pre-oxidization temperature increasing to 1273 K for 2 h. After an appropriate pre-oxidization treatment of n-SiCp at 1073 K for 2 h, the as-extruded 0.5 vol % n-SiCp/AT81 composites exhibited an enhanced strength. It was found that the yield strength (YS) and ultimate tensile strength (UTS) increased from 168 MPa and 311 MPa to 255 MPa and 393 MPa compared with the as-extruded AT81 alloy, reflecting 51.8% and 26.4% increments, respectively. The improvement of mechanical properties should be mainly attributed to the grain refinement and homogeneous distribution of n-SiCp in the composites. Moreover, a well-bonded interface and the formation of an appropriate amount of interfacial product (MgAl2O4) benefited the material’s mechanical properties.
topic magnesium
nano-SiC particulates
pre-oxidation parameters
powder metallurgy
tensile properties
url http://www.mdpi.com/1996-1944/9/12/964
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