Effect of CNT Contents on the Microstructure and Properties of CNT/TiMg Composites
Carbon nanotubes (CNTs), dispersed in absolute ethanol, were evenly mixed into Ti/MgH<sub>2</sub> powders by wet milling. Then, we applied the vacuum hot-pressed sinteringmethod to the CNTs/TiMg composite materials. An optical microscope (OM), X-ray diffraction (XRD), scanning electron m...
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doaj-b58b45d3791f45a88a426e9f9988c6232020-11-24T21:28:51ZengMDPI AGMaterials1996-19442019-05-011210162010.3390/ma12101620ma12101620Effect of CNT Contents on the Microstructure and Properties of CNT/TiMg CompositesXiaomin Yuan0Haonan Zhu1Huiling Ji2Yiwei Zhang3School of Materials Science and Engineering, Anhui University of Technology, Ma’anshan 243002, ChinaSchool of Materials Science and Engineering, Anhui University of Technology, Ma’anshan 243002, ChinaDepartment of Mechanical Engineering, Industrial & Commercial of Anhui University of Technology, Dangtu 243100, ChinaSchool of Materials Science and Engineering, Anhui University of Technology, Ma’anshan 243002, ChinaCarbon nanotubes (CNTs), dispersed in absolute ethanol, were evenly mixed into Ti/MgH<sub>2</sub> powders by wet milling. Then, we applied the vacuum hot-pressed sinteringmethod to the CNTs/TiMg composite materials. An optical microscope (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) and a field emission scanning electron microscope (FESEM) were used for the microstructure observation and phase analysis of samples. The mechanical properties were measured via the micro-vickers hardness. The results show that the main phases in the composites were Ti, Mg and C. Meanwhile, a small amount of Ti-Mg solid solution phase was also found. The cross-section morphology of the composites shows that the melted magnesium fills the grain interface during extrusion and that the composites have a better compactness.The microstructures of the composites have been greatly refined as the CNT contents increased. The structure of the composites was further refined when 0.5 wt.% CNTs were added. The fracture surface is obviously a ductile fracture. The microhardness increases obviously with the CNT content increasing. When the content of the CNTs is 1.0 wt.%, the microhardness of the composites reaches 232 HV, which is 24% higher than that of the matrix.https://www.mdpi.com/1996-1944/12/10/1620carbon nanotubesMgH<sub>2</sub>hot pressing sinteringTi-Mg alloy |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xiaomin Yuan Haonan Zhu Huiling Ji Yiwei Zhang |
spellingShingle |
Xiaomin Yuan Haonan Zhu Huiling Ji Yiwei Zhang Effect of CNT Contents on the Microstructure and Properties of CNT/TiMg Composites Materials carbon nanotubes MgH<sub>2</sub> hot pressing sintering Ti-Mg alloy |
author_facet |
Xiaomin Yuan Haonan Zhu Huiling Ji Yiwei Zhang |
author_sort |
Xiaomin Yuan |
title |
Effect of CNT Contents on the Microstructure and Properties of CNT/TiMg Composites |
title_short |
Effect of CNT Contents on the Microstructure and Properties of CNT/TiMg Composites |
title_full |
Effect of CNT Contents on the Microstructure and Properties of CNT/TiMg Composites |
title_fullStr |
Effect of CNT Contents on the Microstructure and Properties of CNT/TiMg Composites |
title_full_unstemmed |
Effect of CNT Contents on the Microstructure and Properties of CNT/TiMg Composites |
title_sort |
effect of cnt contents on the microstructure and properties of cnt/timg composites |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-05-01 |
description |
Carbon nanotubes (CNTs), dispersed in absolute ethanol, were evenly mixed into Ti/MgH<sub>2</sub> powders by wet milling. Then, we applied the vacuum hot-pressed sinteringmethod to the CNTs/TiMg composite materials. An optical microscope (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) and a field emission scanning electron microscope (FESEM) were used for the microstructure observation and phase analysis of samples. The mechanical properties were measured via the micro-vickers hardness. The results show that the main phases in the composites were Ti, Mg and C. Meanwhile, a small amount of Ti-Mg solid solution phase was also found. The cross-section morphology of the composites shows that the melted magnesium fills the grain interface during extrusion and that the composites have a better compactness.The microstructures of the composites have been greatly refined as the CNT contents increased. The structure of the composites was further refined when 0.5 wt.% CNTs were added. The fracture surface is obviously a ductile fracture. The microhardness increases obviously with the CNT content increasing. When the content of the CNTs is 1.0 wt.%, the microhardness of the composites reaches 232 HV, which is 24% higher than that of the matrix. |
topic |
carbon nanotubes MgH<sub>2</sub> hot pressing sintering Ti-Mg alloy |
url |
https://www.mdpi.com/1996-1944/12/10/1620 |
work_keys_str_mv |
AT xiaominyuan effectofcntcontentsonthemicrostructureandpropertiesofcnttimgcomposites AT haonanzhu effectofcntcontentsonthemicrostructureandpropertiesofcnttimgcomposites AT huilingji effectofcntcontentsonthemicrostructureandpropertiesofcnttimgcomposites AT yiweizhang effectofcntcontentsonthemicrostructureandpropertiesofcnttimgcomposites |
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1725968997790253056 |