High-entropy (Ti_0.2V_0.2Nb_0.2Mo_0.2W_0.2)Si₂ with excellent high-temperature wear resistance

Li, Jicheng1,2,3; Chen, Shuna4; Fan, Hengzhong1; Zhang, Qiangqiang2; Su, Yunfeng1; Song, Junjie1; Hu, Litian1; Zhou, Yanchun5; Zhang, Yongsheng1,3

2023-12-01

10.1111/jace.19592

JOURNAL OF THE AMERICAN CERAMIC SOCIETY   影响因子和分区

0002-7820

1551-2916

The oxidation products (MoO3 and V2O(5)) have low melting points and tend to sublimate at high temperatures despite that MoSi2 and VSi2 may possess good self-lubricating properties. To cope with this challenge, a high-entropy transition metal disilicide was designed in this work in which transition metal elements that could form high melting point oxides were deliberately added. The high-entropy (Ti0.2V0.2Nb0.2Mo0.2W0.2)Si-2 (HE-MSi2) with hexagonal structure was successfully prepared by SPS using Ti, V, Nb, Mo, W, and Si powders as the initial materials in this work. The HE-MSi2 presents a high hardness (11.8 +/- 0.4 GPa) and elastic modulus (387.2 +/- 46.8 GPa). In particular, its hardness is higher than that of the corresponding disilicides. Noteworthy, HE-MSi2 demonstrated superior wear resistance when compared to Mo-Si-based ceramics (such as MoSi2, Mo5Si3, and Mo5SiB2), high-entropy carbides (such as (MoTaWVTi)C, (HfMoNbTaTi)C, and (TiVNbMoW)(4.375), and traditional single-phase ceramics (including Sialon, Si3N4, Al(2)O3, SiC, and ZrO2). Meanwhile, at a high temperature of 600(degrees)C, the friction coefficient and wear rate were reduced to 0.64 +/- 0.05 and (1.88 +/- 0.15)x10(6) mm(3)/N.m, respectively. The preferential oxidation of different elements of the HE-MSi2 was validated through systematical characterization of composition evolution, which was dominantly impacted by high temperature and friction induction.

oxidation synthesis transition metal disilicides wear/wear resistance

SCI ; EI

英语

其他

West Light Foundation of The Chinese Academy of Sciences[2021] ; Key Research and Development Project of Gansu Province[20YF8GA001] ; null[2022YFB3809000]

Materials Science

Materials Science, Ceramics

WOS:001114624000001

WILEY

20234915174074

Alumina ; Aluminum oxide ; Entropy ; Friction ; Hardness ; Melting point ; Molybdenum compounds ; Niobium compounds ; Oxidation ; Silicon carbide ; Titanium compounds ; Transition metals ; Vanadium pentoxide ; Wear of materials ; Zirconia

Metallurgy and Metallography:531 ; Thermodynamics:641.1 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85178462895

Web of Science

1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou, Peoples R China
2.Lanzhou Univ, Coll Civil Engn & Mech, Key Lab Mech Disaster & Environm Western China, Minist Educ China, Lanzhou, Peoples R China
3.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing, Peoples R China
4.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen, Peoples R China
5.Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou, Peoples R China

Li, Jicheng,Chen, Shuna,Fan, Hengzhong,et al. High-entropy (Ti_0.2V_0.2Nb_0.2Mo_0.2W_0.2)Si₂ with excellent high-temperature wear resistance[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2023,107(4):2750-2764.

Li, Jicheng.,Chen, Shuna.,Fan, Hengzhong.,Zhang, Qiangqiang.,Su, Yunfeng.,...&Zhang, Yongsheng.(2023).High-entropy (Ti_0.2V_0.2Nb_0.2Mo_0.2W_0.2)Si₂ with excellent high-temperature wear resistance.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,107(4),2750-2764.

Li, Jicheng,et al."High-entropy (Ti_0.2V_0.2Nb_0.2Mo_0.2W_0.2)Si₂ with excellent high-temperature wear resistance".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 107.4(2023):2750-2764.