Effect of the degree of densification on the unlubricated sliding-wear behaviour of monolithic B4C ceramics

被引：8

作者：

Rodriguez-Rojas, Fernando ^{[1
]}

Zamora, Victor ^{[1
]}

Guiberteau, Fernando ^{[1
]}

Ortiz, Angel L. ^{[1
]}

机构：

[1] Univ Extremadura, Dept Ingn Mecan Energet & Mat, Badajoz 06006, Spain

来源：

TRIBOLOGY INTERNATIONAL | 2023年 / 186卷

关键词：

B4C; Monolithic ceramics; Superhard materials; Sliding wear; BORON-CARBIDE CERAMICS; GRAIN-SIZE; ABRASIVE WEAR; RESISTANCE; TEMPERATURE; HARDNESS; AIR; DRY; MICROSTRUCTURE; TOUGHNESS;

D O I：

10.1016/j.triboint.2023.108656

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The unlubricated sliding-wear behaviour of monolithic B4C ceramics with densification degree from-62 % up to-99.1 %, and therefore hardness from-7.9 GPa up to-35.3 GPa, was investigated. It was found that the specific wear rate decreases somewhat asymptotically by one order of magnitude (from 10-7 down to 10-8 mm3/ (N m)) with the increase of densification degree/hardness. This is because, while wear always occurred by abrasion, below a certain threshold of densification/hardness it took place predominantly in brittle mode by fracture-dominated three-body abrasion and above that threshold predominantly in ductile mode by plasticity-dominated two-body abrasion. Finally, it was found that over-sintering of monolithic B4C ceramics above their near-full densification condition is impractical and could even be detrimental for tribological applications.

引用

页数：8

共 42 条

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Zamora, Victor ;

Guiberteau, Fernando ;

Ortiz, Angel L. .

CERAMICS INTERNATIONAL, 2021, 47 (17) :24831-24840

[42] Hardness and wear resistance of B4C ceramics prepared with several additives [J].

Zorzi, JE ;

Perottoni, CA ;

da Jornada, JAH .

MATERIALS LETTERS, 2005, 59 (23) :2932-2935

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