An investigation on the nano-abrasion wear mechanisms of KDP crystals

Yang，Shengyao1; Zhang，Liangchi2,3; Wu，Zhonghuai1

2021

10.1016/j.wear.2021.203692

WEAR   影响因子和分区

0043-1648

1873-2577

Potassium dihydrogen phosphate (KDP) is an important material in the optics industry due to its excellent physical and optical properties. It is also a difficult-to-process material due to its brittleness and sensitivity to environment and external stresses such as contact sliding stresses, temperature variation and humidity change. This paper presents the first investigation into the nano-abrasion wear mechanisms of KDP using molecular dynamics (MD) analysis. Nanoscratching simulations were conducted with various scratching depths in various crystallographic orientations. It was found that the deformation mechanisms of KDP under nano-abrasion are greatly affected by the anisotropy of the material. The nano-abrasion on the (001) surface experiences the least resistance of material removal. The elastic recovery on the (100) surface is greater than that on the (001) surface. The coefficient of friction increases with increasing the scratching depth, and reaches the highest on the (001) surface. Different phase transformations emerge under contact stresses. The study revealed that the phase transformations are initiated under corresponding critical hydrostatic stresses with high shear stress.

Molecular dynamics Nano-abrasion Phase transformation Potassium dihydrogen phosphate Scratching Wear mechanisms

SCI ; EI

英语

通讯

Australian Research Council[DP170100567] ; Guangdong Specific Discipline Project[2020ZDZX2006]

Engineering ; Materials Science

Engineering, Mechanical ; Materials Science, Multidisciplinary

WOS:000679096200003

ELSEVIER SCIENCE SA

20210809972731

Crystals ; Erosion ; Fracture mechanics ; Friction ; Molecular dynamics ; Optical properties ; Phase transitions ; Potassium compounds ; Sensitivity analysis ; Shear stress ; Tribology

Light/Optics:741.1 ; Physical Chemistry:801.4 ; Mathematics:921 ; Classical Physics; Quantum Theory; Relativity:931 ; Mechanics:931.1 ; Crystalline Solids:933.1 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85101241598

Scopus

1.Laboratory for Precision and Nano Processing Technologies,School of Mechanical and Manufacturing Engineering,The University of New South Wales,Sydney,2052,Australia
2.Shenzhen Key Laboratory of Cross-Scale Manufacturing Mechanics,Southern University of Science and Technology,Shenzhen,518055,China
3.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Yang，Shengyao,Zhang，Liangchi,Wu，Zhonghuai. An investigation on the nano-abrasion wear mechanisms of KDP crystals[J]. WEAR,2021,476.

Yang，Shengyao,Zhang，Liangchi,&Wu，Zhonghuai.(2021).An investigation on the nano-abrasion wear mechanisms of KDP crystals.WEAR,476.

Yang，Shengyao,et al."An investigation on the nano-abrasion wear mechanisms of KDP crystals".WEAR 476(2021).