High temperature tribological behaviors of (WAl)C-Co ceramic composites with the additions of fluoride solid lubricants

Jun Cheng; Zhuhui Qiao; Bing Yin; Junying Hao; Jun Yang; Weimin Liu

doi:10.1016/j.matchemphys.2015.07.039

High temperature tribological behaviors of (WAl)C-Co ceramic composites with the additions of fluoride solid lubricants

Jun Cheng, Zhuhui Qiao, Bing Yin, Junying Hao, Jun Yang, Weimin Liu

CAS - Lanzhou Institute of Chemical Physics

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

8 Scopus citations

Abstract

The tribological behaviors of the (W_0.67Al_0.33)C_0.67-Co/fluoride (CaF₂, BaF₂, CaF₂/BaF₂) composites against SiC ball from room temperature to 600 °C were investigated. A marked increase in the friction coefficient resulting from fluoride oxidation was observed as the temperature increased. The composites containing BaF₂ or (Ca, Ba)F₂ displayed better integrated wear resistance over a wide temperature range compared with (W_0.67Al_0.33)C_0.67-Co/CaF₂. The high temperature tribological characteristics of the three composites were distinct, which originated from the composition difference on the worn surfaces. First, the SiO₂/SiC film formed on the worn surfaces of the composites with BaF₂ or (Ca, Ba)F₂ was favorable for their wear resistance. Second, the oxidation of WC matrix was an important factor influencing the wear resistance of the composites. When mixture oxides of WO₂ and WO₃ appeared on the surface, wear is severe. In addition, single WO₃ formed on the worn surfaces, appeared more adhesive to the underlying substrate and decreased the wear rate.

Original language	English
Pages (from-to)	262-271
Number of pages	10
Journal	Materials Chemistry and Physics
Volume	163
DOIs	https://doi.org/10.1016/j.matchemphys.2015.07.039
State	Published - 1 Aug 2015
Externally published	Yes

Keywords

Carbides
Oxidation
Powder metallurgy
Tribology

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10.1016/j.matchemphys.2015.07.039

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title = "High temperature tribological behaviors of (WAl)C-Co ceramic composites with the additions of fluoride solid lubricants",

abstract = "The tribological behaviors of the (W0.67Al0.33)C0.67-Co/fluoride (CaF2, BaF2, CaF2/BaF2) composites against SiC ball from room temperature to 600 °C were investigated. A marked increase in the friction coefficient resulting from fluoride oxidation was observed as the temperature increased. The composites containing BaF2 or (Ca, Ba)F2 displayed better integrated wear resistance over a wide temperature range compared with (W0.67Al0.33)C0.67-Co/CaF2. The high temperature tribological characteristics of the three composites were distinct, which originated from the composition difference on the worn surfaces. First, the SiO2/SiC film formed on the worn surfaces of the composites with BaF2 or (Ca, Ba)F2 was favorable for their wear resistance. Second, the oxidation of WC matrix was an important factor influencing the wear resistance of the composites. When mixture oxides of WO2 and WO3 appeared on the surface, wear is severe. In addition, single WO3 formed on the worn surfaces, appeared more adhesive to the underlying substrate and decreased the wear rate.",

keywords = "Carbides, Oxidation, Powder metallurgy, Tribology",

author = "Jun Cheng and Zhuhui Qiao and Bing Yin and Junying Hao and Jun Yang and Weimin Liu",

year = "2015",

month = aug,

day = "1",

doi = "10.1016/j.matchemphys.2015.07.039",

language = "英语",

volume = "163",

pages = "262--271",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

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TY - JOUR

T1 - High temperature tribological behaviors of (WAl)C-Co ceramic composites with the additions of fluoride solid lubricants

AU - Cheng, Jun

AU - Qiao, Zhuhui

AU - Yin, Bing

AU - Hao, Junying

AU - Yang, Jun

AU - Liu, Weimin

PY - 2015/8/1

Y1 - 2015/8/1

N2 - The tribological behaviors of the (W0.67Al0.33)C0.67-Co/fluoride (CaF2, BaF2, CaF2/BaF2) composites against SiC ball from room temperature to 600 °C were investigated. A marked increase in the friction coefficient resulting from fluoride oxidation was observed as the temperature increased. The composites containing BaF2 or (Ca, Ba)F2 displayed better integrated wear resistance over a wide temperature range compared with (W0.67Al0.33)C0.67-Co/CaF2. The high temperature tribological characteristics of the three composites were distinct, which originated from the composition difference on the worn surfaces. First, the SiO2/SiC film formed on the worn surfaces of the composites with BaF2 or (Ca, Ba)F2 was favorable for their wear resistance. Second, the oxidation of WC matrix was an important factor influencing the wear resistance of the composites. When mixture oxides of WO2 and WO3 appeared on the surface, wear is severe. In addition, single WO3 formed on the worn surfaces, appeared more adhesive to the underlying substrate and decreased the wear rate.

AB - The tribological behaviors of the (W0.67Al0.33)C0.67-Co/fluoride (CaF2, BaF2, CaF2/BaF2) composites against SiC ball from room temperature to 600 °C were investigated. A marked increase in the friction coefficient resulting from fluoride oxidation was observed as the temperature increased. The composites containing BaF2 or (Ca, Ba)F2 displayed better integrated wear resistance over a wide temperature range compared with (W0.67Al0.33)C0.67-Co/CaF2. The high temperature tribological characteristics of the three composites were distinct, which originated from the composition difference on the worn surfaces. First, the SiO2/SiC film formed on the worn surfaces of the composites with BaF2 or (Ca, Ba)F2 was favorable for their wear resistance. Second, the oxidation of WC matrix was an important factor influencing the wear resistance of the composites. When mixture oxides of WO2 and WO3 appeared on the surface, wear is severe. In addition, single WO3 formed on the worn surfaces, appeared more adhesive to the underlying substrate and decreased the wear rate.

KW - Carbides

KW - Oxidation

KW - Powder metallurgy

KW - Tribology

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U2 - 10.1016/j.matchemphys.2015.07.039

DO - 10.1016/j.matchemphys.2015.07.039

M3 - 文章

AN - SCOPUS:84940460286

SN - 0254-0584

VL - 163

SP - 262

EP - 271

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

ER -

High temperature tribological behaviors of (WAl)C-Co ceramic composites with the additions of fluoride solid lubricants

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Keywords

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