Hard and tough CrN coatings strengthened by high-density distorted coherent grain boundaries

Liangliang Liu; Qingdong Ruan; Zhongzhen Wu; Tijun Li; Wei Zuo; Chao Huang; Yuzheng Wu; Zhongcan Wu; Ricky K.Y. Fu; Paul K. Chu

doi:10.1016/j.jallcom.2021.162139

Hard and tough CrN coatings strengthened by high-density distorted coherent grain boundaries

Liangliang Liu
, Qingdong Ruan
, Zhongzhen Wu^*
, Tijun Li
, Wei Zuo
, Chao Huang
, Yuzheng Wu
, Zhongcan Wu
, Ricky K.Y. Fu
, Paul K. Chu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

22 Citations (Scopus)

Abstract

Coherent grain boundaries (CGBs) has been revealed to improve the hardness and toughness simultaneously, but the density are not enough to increase their mechanical properties. Herein, hetero-interfaces are formed by introducing ion bombardment during magnetron sputtering to increase the amount of CGBs in the CrN coatings. By optimizing the sub-layer thickness, the quantity and width of CGBs from the (111) to (200) orientations increase significantly and consequently, the hardness and toughness of the CrN coating increase to 33.4 GPa and 14.98 MPa m^1/2, respectively. At last, the effect of the different CGBs to the coating strengthen is discussed.

Original language	English
Article number	162139
Journal	Journal of Alloys and Compounds
Volume	894
Online published	28 Sept 2021
DOIs	https://doi.org/10.1016/j.jallcom.2021.162139
Publication status	Published - 15 Feb 2022

Research Keywords

Coatings
Coherent grain boundaries
Hardness
Toughness

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10.1016/j.jallcom.2021.162139

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@article{a2aaba56919f4ea7af565cabe630a2cb,

title = "Hard and tough CrN coatings strengthened by high-density distorted coherent grain boundaries",

abstract = "Coherent grain boundaries (CGBs) has been revealed to improve the hardness and toughness simultaneously, but the density are not enough to increase their mechanical properties. Herein, hetero-interfaces are formed by introducing ion bombardment during magnetron sputtering to increase the amount of CGBs in the CrN coatings. By optimizing the sub-layer thickness, the quantity and width of CGBs from the (111) to (200) orientations increase significantly and consequently, the hardness and toughness of the CrN coating increase to 33.4 GPa and 14.98 MPa m1/2, respectively. At last, the effect of the different CGBs to the coating strengthen is discussed.",

keywords = "Coatings, Coherent grain boundaries, Hardness, Toughness",

author = "Liangliang Liu and Qingdong Ruan and Zhongzhen Wu and Tijun Li and Wei Zuo and Chao Huang and Yuzheng Wu and Zhongcan Wu and Fu, \{Ricky K.Y.\} and Chu, \{Paul K.\}",

year = "2022",

month = feb,

day = "15",

doi = "10.1016/j.jallcom.2021.162139",

language = "English",

volume = "894",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Hard and tough CrN coatings strengthened by high-density distorted coherent grain boundaries

AU - Liu, Liangliang

AU - Ruan, Qingdong

AU - Wu, Zhongzhen

AU - Li, Tijun

AU - Zuo, Wei

AU - Huang, Chao

AU - Wu, Yuzheng

AU - Wu, Zhongcan

AU - Fu, Ricky K.Y.

AU - Chu, Paul K.

PY - 2022/2/15

Y1 - 2022/2/15

N2 - Coherent grain boundaries (CGBs) has been revealed to improve the hardness and toughness simultaneously, but the density are not enough to increase their mechanical properties. Herein, hetero-interfaces are formed by introducing ion bombardment during magnetron sputtering to increase the amount of CGBs in the CrN coatings. By optimizing the sub-layer thickness, the quantity and width of CGBs from the (111) to (200) orientations increase significantly and consequently, the hardness and toughness of the CrN coating increase to 33.4 GPa and 14.98 MPa m1/2, respectively. At last, the effect of the different CGBs to the coating strengthen is discussed.

AB - Coherent grain boundaries (CGBs) has been revealed to improve the hardness and toughness simultaneously, but the density are not enough to increase their mechanical properties. Herein, hetero-interfaces are formed by introducing ion bombardment during magnetron sputtering to increase the amount of CGBs in the CrN coatings. By optimizing the sub-layer thickness, the quantity and width of CGBs from the (111) to (200) orientations increase significantly and consequently, the hardness and toughness of the CrN coating increase to 33.4 GPa and 14.98 MPa m1/2, respectively. At last, the effect of the different CGBs to the coating strengthen is discussed.

KW - Coatings

KW - Coherent grain boundaries

KW - Hardness

KW - Toughness

UR - https://www.scopus.com/pages/publications/85118482197

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85118482197&origin=recordpage

U2 - 10.1016/j.jallcom.2021.162139

DO - 10.1016/j.jallcom.2021.162139

M3 - RGC 21 - Publication in refereed journal

SN - 0925-8388

VL - 894

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 162139

ER -

Hard and tough CrN coatings strengthened by high-density distorted coherent grain boundaries

Abstract

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ITF: Development of Key Technology to Attain a Novel Kind of Artificial Acetabulum

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Hard and tough CrN coatings strengthened by high-density distorted coherent grain boundaries

Abstract

Research Keywords

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ITF: Development of Key Technology to Attain a Novel Kind of Artificial Acetabulum

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