Vacuum tribological behaviors of CoCrFeNi high entropy alloy at elevated temperatures

Yushan Geng; Jiao Chen; Hui Tan; Jun Cheng; Jun Yang; Weimin Liu

doi:10.1016/j.wear.2020.203368

Vacuum tribological behaviors of CoCrFeNi high entropy alloy at elevated temperatures

Yushan Geng
, Jiao Chen
, Hui Tan
, Jun Cheng
, Jun Yang
, Weimin Liu

CAS - Lanzhou Institute of Chemical Physics
University of Chinese Academy of Sciences

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

105 Scopus citations

Abstract

High entropy alloys (HEAs) are an important candidate for high temperature mechanical systems. Here, effects of atmosphere, temperature and counterparts on the vacuum tribological behaviors of CoCrFeNi HEA fabricated by spark plasma sintering were systematically studied. Comparison of tribological behaviors in vacuum and air indicated that tribo-oxidation is detrimental to the wear resistance of CoCrFeNi HEA within temperature range 25–400 °C, but positive at 600 and 800 °C. The CoCrFeNi HEA obtains relatively low wear in vacuum when low testing temperatures and heterogeneous counterface are selected. The wear resistance of CoCrFeNi HEA in vacuum is superior or comparable to the steel and intermetallics.

Original language	English
Article number	203368
Journal	Wear
Volume	456-457
DOIs	https://doi.org/10.1016/j.wear.2020.203368
State	Published - 15 Sep 2020
Externally published	Yes

Keywords

CoCrFeNi high Entropy alloy
High temperature
Spark plasma sintering
Tribo-chemistry
Vacuum

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10.1016/j.wear.2020.203368

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title = "Vacuum tribological behaviors of CoCrFeNi high entropy alloy at elevated temperatures",

abstract = "High entropy alloys (HEAs) are an important candidate for high temperature mechanical systems. Here, effects of atmosphere, temperature and counterparts on the vacuum tribological behaviors of CoCrFeNi HEA fabricated by spark plasma sintering were systematically studied. Comparison of tribological behaviors in vacuum and air indicated that tribo-oxidation is detrimental to the wear resistance of CoCrFeNi HEA within temperature range 25–400 °C, but positive at 600 and 800 °C. The CoCrFeNi HEA obtains relatively low wear in vacuum when low testing temperatures and heterogeneous counterface are selected. The wear resistance of CoCrFeNi HEA in vacuum is superior or comparable to the steel and intermetallics.",

keywords = "CoCrFeNi high Entropy alloy, High temperature, Spark plasma sintering, Tribo-chemistry, Vacuum",

author = "Yushan Geng and Jiao Chen and Hui Tan and Jun Cheng and Jun Yang and Weimin Liu",

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day = "15",

doi = "10.1016/j.wear.2020.203368",

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TY - JOUR

T1 - Vacuum tribological behaviors of CoCrFeNi high entropy alloy at elevated temperatures

AU - Geng, Yushan

AU - Chen, Jiao

AU - Tan, Hui

AU - Cheng, Jun

AU - Yang, Jun

AU - Liu, Weimin

PY - 2020/9/15

Y1 - 2020/9/15

N2 - High entropy alloys (HEAs) are an important candidate for high temperature mechanical systems. Here, effects of atmosphere, temperature and counterparts on the vacuum tribological behaviors of CoCrFeNi HEA fabricated by spark plasma sintering were systematically studied. Comparison of tribological behaviors in vacuum and air indicated that tribo-oxidation is detrimental to the wear resistance of CoCrFeNi HEA within temperature range 25–400 °C, but positive at 600 and 800 °C. The CoCrFeNi HEA obtains relatively low wear in vacuum when low testing temperatures and heterogeneous counterface are selected. The wear resistance of CoCrFeNi HEA in vacuum is superior or comparable to the steel and intermetallics.

AB - High entropy alloys (HEAs) are an important candidate for high temperature mechanical systems. Here, effects of atmosphere, temperature and counterparts on the vacuum tribological behaviors of CoCrFeNi HEA fabricated by spark plasma sintering were systematically studied. Comparison of tribological behaviors in vacuum and air indicated that tribo-oxidation is detrimental to the wear resistance of CoCrFeNi HEA within temperature range 25–400 °C, but positive at 600 and 800 °C. The CoCrFeNi HEA obtains relatively low wear in vacuum when low testing temperatures and heterogeneous counterface are selected. The wear resistance of CoCrFeNi HEA in vacuum is superior or comparable to the steel and intermetallics.

KW - CoCrFeNi high Entropy alloy

KW - High temperature

KW - Spark plasma sintering

KW - Tribo-chemistry

KW - Vacuum

UR - https://www.scopus.com/pages/publications/85086744997

U2 - 10.1016/j.wear.2020.203368

DO - 10.1016/j.wear.2020.203368

M3 - 文章

AN - SCOPUS:85086744997

SN - 0043-1648

VL - 456-457

JO - Wear

JF - Wear

M1 - 203368

ER -

Vacuum tribological behaviors of CoCrFeNi high entropy alloy at elevated temperatures

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Keywords

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