Preparation and mechanical properties of hard metals using graphene as carbon source

Xilong Wang; Xiaoyan Song; Zhexu Zhang; Xuemei Liu; Xingwei Liu; Cheng Yang; Yuxi Li

Preparation and mechanical properties of hard metals using graphene as carbon source

Xilong Wang, Xiaoyan Song^*, Zhexu Zhang, Xuemei Liu, Xingwei Liu, Cheng Yang, Yuxi Li

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Normal carbon source black carbon was substituted by graphene which was dispersed in N-Methyl-2-pyrrolidone and nanocrystalline WC-Co composite powders were prepared using a short process in-situ reduction and carbonization reaction method. The results show that graphene as the carbon source could decrease the reaction temperature, and the particles of WC-Co composite powders are fine and the particle size distributes uniformly. Composite powders were consolidated through the spark plasma sintering system and the mean grain size of WC in WC-Co cemented carbides is about 290 nm. Vickers hardness and fracture toughness of the bulk is 13.877±0.131 GPa and 8.3±0.1 MPa·m^1/2, respectively. HRTEM images show that the grain boundaries of interfaces between WC/WC, WC/Co and WC/C are of low misfit.

Original language	English
Pages (from-to)	3262-3266
Number of pages	5
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	45
Issue number	12
Publication status	Published - 1 Dec 2016
Externally published	Yes

Keywords

Hard metals
In-situ reaction
Mechanical properties
Microstructure
Spark plasma sintering

Cite this

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title = "Preparation and mechanical properties of hard metals using graphene as carbon source",

abstract = "Normal carbon source black carbon was substituted by graphene which was dispersed in N-Methyl-2-pyrrolidone and nanocrystalline WC-Co composite powders were prepared using a short process in-situ reduction and carbonization reaction method. The results show that graphene as the carbon source could decrease the reaction temperature, and the particles of WC-Co composite powders are fine and the particle size distributes uniformly. Composite powders were consolidated through the spark plasma sintering system and the mean grain size of WC in WC-Co cemented carbides is about 290 nm. Vickers hardness and fracture toughness of the bulk is 13.877±0.131 GPa and 8.3±0.1 MPa·m1/2, respectively. HRTEM images show that the grain boundaries of interfaces between WC/WC, WC/Co and WC/C are of low misfit.",

keywords = "Hard metals, In-situ reaction, Mechanical properties, Microstructure, Spark plasma sintering",

author = "Xilong Wang and Xiaoyan Song and Zhexu Zhang and Xuemei Liu and Xingwei Liu and Cheng Yang and Yuxi Li",

year = "2016",

month = dec,

day = "1",

language = "English",

volume = "45",

pages = "3262--3266",

journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

issn = "1002-185X",

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number = "12",

}

TY - JOUR

T1 - Preparation and mechanical properties of hard metals using graphene as carbon source

AU - Wang, Xilong

AU - Song, Xiaoyan

AU - Zhang, Zhexu

AU - Liu, Xuemei

AU - Liu, Xingwei

AU - Yang, Cheng

AU - Li, Yuxi

PY - 2016/12/1

Y1 - 2016/12/1

N2 - Normal carbon source black carbon was substituted by graphene which was dispersed in N-Methyl-2-pyrrolidone and nanocrystalline WC-Co composite powders were prepared using a short process in-situ reduction and carbonization reaction method. The results show that graphene as the carbon source could decrease the reaction temperature, and the particles of WC-Co composite powders are fine and the particle size distributes uniformly. Composite powders were consolidated through the spark plasma sintering system and the mean grain size of WC in WC-Co cemented carbides is about 290 nm. Vickers hardness and fracture toughness of the bulk is 13.877±0.131 GPa and 8.3±0.1 MPa·m1/2, respectively. HRTEM images show that the grain boundaries of interfaces between WC/WC, WC/Co and WC/C are of low misfit.

AB - Normal carbon source black carbon was substituted by graphene which was dispersed in N-Methyl-2-pyrrolidone and nanocrystalline WC-Co composite powders were prepared using a short process in-situ reduction and carbonization reaction method. The results show that graphene as the carbon source could decrease the reaction temperature, and the particles of WC-Co composite powders are fine and the particle size distributes uniformly. Composite powders were consolidated through the spark plasma sintering system and the mean grain size of WC in WC-Co cemented carbides is about 290 nm. Vickers hardness and fracture toughness of the bulk is 13.877±0.131 GPa and 8.3±0.1 MPa·m1/2, respectively. HRTEM images show that the grain boundaries of interfaces between WC/WC, WC/Co and WC/C are of low misfit.

KW - Hard metals

KW - In-situ reaction

KW - Mechanical properties

KW - Microstructure

KW - Spark plasma sintering

UR - http://www.scopus.com/inward/record.url?scp=85009910440&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85009910440

SN - 1002-185X

VL - 45

SP - 3262

EP - 3266

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 12

ER -

Preparation and mechanical properties of hard metals using graphene as carbon source

Abstract

Keywords

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