Toughness enhancement and thermal properties of graphene-CNTs reinforced Al2O3 ceramic hybrid nanocomposites

W. A. Shah; X. Luo; B. I. Rabiu; B. Huang; Y. Q. Yang

doi:10.1016/j.cplett.2021.138978

Toughness enhancement and thermal properties of graphene-CNTs reinforced Al₂O₃ ceramic hybrid nanocomposites

W. A. Shah
, X. Luo
, B. I. Rabiu
, B. Huang
, Y. Q. Yang

材料学院

Northwestern Polytechnical University Xian

科研成果: 期刊稿件 › 文章 › 同行评审

31 引用（Scopus）

摘要

Graphene/CNTs-reinforced alumina ceramic composites were prepared by spark plasma sintering (SPS) method at 1500 °C. The distribution behaviors of graphene/CNTs reinforcements in alumina matrix composite were studied and mechanical properties of the composite were tested. The structural integrity of the graphene after sintering was analyzed by Raman spectroscopy. The composites show inter and trans-granular fracture behaviors. Many toughening mechanisms such as graphene and CNTs necking, crack bridging, crack deflection and crack branching were observed. The experiment-based calculation of heat capacity of the composite was presented in details. The thermal diffusivity and thermal conductivity of the nanocomposites were discussed. The thermal conductivity increased with the increase of grain size. The pure alumina had the highest thermal conductivity, which was 23.9 Wm⁻¹ K⁻¹.

源语言	英语
文章编号	138978
期刊	Chemical Physics Letters
卷	781
DOI	https://doi.org/10.1016/j.cplett.2021.138978
出版状态	已出版 - 16 10月 2021

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10.1016/j.cplett.2021.138978

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title = "Toughness enhancement and thermal properties of graphene-CNTs reinforced Al2O3 ceramic hybrid nanocomposites",

abstract = "Graphene/CNTs-reinforced alumina ceramic composites were prepared by spark plasma sintering (SPS) method at 1500 °C. The distribution behaviors of graphene/CNTs reinforcements in alumina matrix composite were studied and mechanical properties of the composite were tested. The structural integrity of the graphene after sintering was analyzed by Raman spectroscopy. The composites show inter and trans-granular fracture behaviors. Many toughening mechanisms such as graphene and CNTs necking, crack bridging, crack deflection and crack branching were observed. The experiment-based calculation of heat capacity of the composite was presented in details. The thermal diffusivity and thermal conductivity of the nanocomposites were discussed. The thermal conductivity increased with the increase of grain size. The pure alumina had the highest thermal conductivity, which was 23.9 Wm−1 K−1.",

keywords = "Alumina, CNTs, Fracture toughness, Graphene, Hardness, SPS, Thermal conductivity",

author = "Shah, \{W. A.\} and X. Luo and Rabiu, \{B. I.\} and B. Huang and Yang, \{Y. Q.\}",

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doi = "10.1016/j.cplett.2021.138978",

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T1 - Toughness enhancement and thermal properties of graphene-CNTs reinforced Al2O3 ceramic hybrid nanocomposites

AU - Shah, W. A.

AU - Luo, X.

AU - Rabiu, B. I.

AU - Huang, B.

AU - Yang, Y. Q.

PY - 2021/10/16

Y1 - 2021/10/16

N2 - Graphene/CNTs-reinforced alumina ceramic composites were prepared by spark plasma sintering (SPS) method at 1500 °C. The distribution behaviors of graphene/CNTs reinforcements in alumina matrix composite were studied and mechanical properties of the composite were tested. The structural integrity of the graphene after sintering was analyzed by Raman spectroscopy. The composites show inter and trans-granular fracture behaviors. Many toughening mechanisms such as graphene and CNTs necking, crack bridging, crack deflection and crack branching were observed. The experiment-based calculation of heat capacity of the composite was presented in details. The thermal diffusivity and thermal conductivity of the nanocomposites were discussed. The thermal conductivity increased with the increase of grain size. The pure alumina had the highest thermal conductivity, which was 23.9 Wm−1 K−1.

AB - Graphene/CNTs-reinforced alumina ceramic composites were prepared by spark plasma sintering (SPS) method at 1500 °C. The distribution behaviors of graphene/CNTs reinforcements in alumina matrix composite were studied and mechanical properties of the composite were tested. The structural integrity of the graphene after sintering was analyzed by Raman spectroscopy. The composites show inter and trans-granular fracture behaviors. Many toughening mechanisms such as graphene and CNTs necking, crack bridging, crack deflection and crack branching were observed. The experiment-based calculation of heat capacity of the composite was presented in details. The thermal diffusivity and thermal conductivity of the nanocomposites were discussed. The thermal conductivity increased with the increase of grain size. The pure alumina had the highest thermal conductivity, which was 23.9 Wm−1 K−1.

KW - Alumina

KW - CNTs

KW - Fracture toughness

KW - Graphene

KW - Hardness

KW - SPS

KW - Thermal conductivity

UR - https://www.scopus.com/pages/publications/85113320175

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DO - 10.1016/j.cplett.2021.138978

M3 - 文章

AN - SCOPUS:85113320175

SN - 0009-2614

VL - 781

JO - Chemical Physics Letters

JF - Chemical Physics Letters

M1 - 138978

ER -

Toughness enhancement and thermal properties of graphene-CNTs reinforced Al2O3 ceramic hybrid nanocomposites

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Toughness enhancement and thermal properties of graphene-CNTs reinforced Al₂O₃ ceramic hybrid nanocomposites