{"title":"Numerical simulation of GaN single-crystal processing using diamond abrasives under graphene lubrication","authors":"","doi":"10.1016/j.micrna.2024.207930","DOIUrl":null,"url":null,"abstract":"<div><p>Molecular dynamics simulations were performed to investigate a novel technique for cutting gallium nitride (GaN) with the help of graphene lubrication. A scratch model of GaN coated with graphene was developed, and changes in the surface topography, atomic displacement, atomic cutting force, temperature, defect atoms, and the process of graphene fracture. The graphene coating on the surface of the GaN workpiece inhibits the movement of atoms in the workpiece during the scratching process, with minimal chip deposition in front of the abrasive. The amount of defective atoms rises as the depth of the scratch increases. Graphene is more susceptible to fracture at larger depths. In addition, using graphene lubrication to cut GaN can enhance surface integrity while concurrently diminishing material removal effectiveness. Furthermore, using graphene as a solid lubricant on various materials, can also greatly reduce friction. These findings provide insights for the design and processing of these brittle materials.</p></div>","PeriodicalId":100923,"journal":{"name":"Micro and Nanostructures","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Micro and Nanostructures","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2773012324001791","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, CONDENSED MATTER","Score":null,"Total":0}
引用次数: 0
Abstract
Molecular dynamics simulations were performed to investigate a novel technique for cutting gallium nitride (GaN) with the help of graphene lubrication. A scratch model of GaN coated with graphene was developed, and changes in the surface topography, atomic displacement, atomic cutting force, temperature, defect atoms, and the process of graphene fracture. The graphene coating on the surface of the GaN workpiece inhibits the movement of atoms in the workpiece during the scratching process, with minimal chip deposition in front of the abrasive. The amount of defective atoms rises as the depth of the scratch increases. Graphene is more susceptible to fracture at larger depths. In addition, using graphene lubrication to cut GaN can enhance surface integrity while concurrently diminishing material removal effectiveness. Furthermore, using graphene as a solid lubricant on various materials, can also greatly reduce friction. These findings provide insights for the design and processing of these brittle materials.
分子动力学模拟研究了一种借助石墨烯润滑切割氮化镓(GaN)的新技术。建立了涂有石墨烯的氮化镓的划痕模型,研究了表面形貌、原子位移、原子切削力、温度、缺陷原子以及石墨烯断裂过程的变化。在划痕过程中,氮化镓工件表面的石墨烯涂层抑制了工件中原子的运动,磨料前的切屑沉积极少。缺陷原子的数量随着划痕深度的增加而增加。划痕深度越大,石墨烯越容易断裂。此外,使用石墨烯润滑来切割 GaN 可以提高表面完整性,同时降低材料去除效果。此外,在各种材料上使用石墨烯作为固体润滑剂,也能大大减少摩擦。这些发现为这些脆性材料的设计和加工提供了启示。