Enhanced thermal stability in Cu-40 wt% Zn/WC nanocomposite

Enhanced thermal stability in Cu-40 wt% Zn/WC nanocomposite

A major challenge for alloy applications is to achieve thermal stability of phase transitions and anti-oxidation properties. Given the stability of ceramic nanoparticles, we propose the incorporation of WC nanoparticles as a novel way to tune the thermal stability of Cu-40 wt% Zn, which is an import...

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Main Authors: Shuaihang Pan, Gongcheng Yao, Maximilian Sokoluk, Zeyi Guan, Xiaochun Li
Format: Article
Language:English
Published: Elsevier 2019-10-01
Series:Materials & Design
Online Access:http://www.sciencedirect.com/science/article/pii/S0264127519304022
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spelling doaj-4d350bcd6ec4418d8ebf6b86d42855032020-11-25T02:39:32ZengElsevierMaterials & Design0264-12752019-10-01180Enhanced thermal stability in Cu-40 wt% Zn/WC nanocompositeShuaihang Pan0Gongcheng Yao1Maximilian Sokoluk2Zeyi Guan3Xiaochun Li4SciFacturing Laboratory, School of Mechanical and Aerospace Engineering, University of California-Los Angeles, CA 90095, USASchool of Materials Science and Engineering, University of California-Los Angeles, CA 90095, USASciFacturing Laboratory, School of Mechanical and Aerospace Engineering, University of California-Los Angeles, CA 90095, USASciFacturing Laboratory, School of Mechanical and Aerospace Engineering, University of California-Los Angeles, CA 90095, USASciFacturing Laboratory, School of Mechanical and Aerospace Engineering, University of California-Los Angeles, CA 90095, USA; School of Materials Science and Engineering, University of California-Los Angeles, CA 90095, USA; Corresponding author at: SciFacturing Laboratory, School of Mechanical and Aerospace Engineering, University of California-Los Angeles, CA 90095, USA.A major challenge for alloy applications is to achieve thermal stability of phase transitions and anti-oxidation properties. Given the stability of ceramic nanoparticles, we propose the incorporation of WC nanoparticles as a novel way to tune the thermal stability of Cu-40 wt% Zn, which is an important alloy known as naval brass. In situ XRD and DSC results confirmed the enhanced thermal stability of Cu-40 wt% Zn/10 vol% WC nanocomposites at higher temperatures were observed for both phase transitions and oxidation. The underlying mechanisms behind Zn diffusion during phase change and oxygen contact are discussed to understand the phenomena. Optical profiles along with SEM and FIB images reveal the morphologies and microstructures of different stages and give supporting information for the above argument. Due to the kinetic and dynamic impedance on Zn diffusion and the intrinsic stability of WC, the higher thermal stability in Cu-40 wt% Zn/WC is achieved. This study provides an effective way to tune thermal stability of alloys, control phase change, and vary post-oxidation morphology. Keywords: Metal matrix nanocomposite, Thermal stability, Phase transition, Anti-oxidation, In situ, ZnOhttp://www.sciencedirect.com/science/article/pii/S0264127519304022
collection DOAJ
language English
format Article
sources DOAJ
author Shuaihang Pan
Gongcheng Yao
Maximilian Sokoluk
Zeyi Guan
Xiaochun Li
spellingShingle Shuaihang Pan
Gongcheng Yao
Maximilian Sokoluk
Zeyi Guan
Xiaochun Li
Enhanced thermal stability in Cu-40 wt% Zn/WC nanocomposite
Materials & Design
author_facet Shuaihang Pan
Gongcheng Yao
Maximilian Sokoluk
Zeyi Guan
Xiaochun Li
author_sort Shuaihang Pan
title Enhanced thermal stability in Cu-40 wt% Zn/WC nanocomposite
title_short Enhanced thermal stability in Cu-40 wt% Zn/WC nanocomposite
title_full Enhanced thermal stability in Cu-40 wt% Zn/WC nanocomposite
title_fullStr Enhanced thermal stability in Cu-40 wt% Zn/WC nanocomposite
title_full_unstemmed Enhanced thermal stability in Cu-40 wt% Zn/WC nanocomposite
title_sort enhanced thermal stability in cu-40 wt% zn/wc nanocomposite
publisher Elsevier
series Materials & Design
issn 0264-1275
publishDate 2019-10-01
description A major challenge for alloy applications is to achieve thermal stability of phase transitions and anti-oxidation properties. Given the stability of ceramic nanoparticles, we propose the incorporation of WC nanoparticles as a novel way to tune the thermal stability of Cu-40 wt% Zn, which is an important alloy known as naval brass. In situ XRD and DSC results confirmed the enhanced thermal stability of Cu-40 wt% Zn/10 vol% WC nanocomposites at higher temperatures were observed for both phase transitions and oxidation. The underlying mechanisms behind Zn diffusion during phase change and oxygen contact are discussed to understand the phenomena. Optical profiles along with SEM and FIB images reveal the morphologies and microstructures of different stages and give supporting information for the above argument. Due to the kinetic and dynamic impedance on Zn diffusion and the intrinsic stability of WC, the higher thermal stability in Cu-40 wt% Zn/WC is achieved. This study provides an effective way to tune thermal stability of alloys, control phase change, and vary post-oxidation morphology. Keywords: Metal matrix nanocomposite, Thermal stability, Phase transition, Anti-oxidation, In situ, ZnO
url http://www.sciencedirect.com/science/article/pii/S0264127519304022
work_keys_str_mv AT shuaihangpan enhancedthermalstabilityincu40wtznwcnanocomposite
AT gongchengyao enhancedthermalstabilityincu40wtznwcnanocomposite
AT maximiliansokoluk enhancedthermalstabilityincu40wtznwcnanocomposite
AT zeyiguan enhancedthermalstabilityincu40wtznwcnanocomposite
AT xiaochunli enhancedthermalstabilityincu40wtznwcnanocomposite
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