首页|氟化六方氮化硼的制备及其作为水基添加剂的摩擦学性能

氟化六方氮化硼的制备及其作为水基添加剂的摩擦学性能

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对NH4F氟源进行恒温磁力搅拌和球磨辅助氟化,制备出氟化氮化硼纳米片(F-BNNSs),在接触Ti6-Al-4V(TC4)/GCr15的条件下研究了六方氮化硼纳米片(h-BNNSs)和氟化氮化硼纳米片(F-BNNSs)作为水基润滑添加剂的摩擦学行为.结果表明,随着h-BN与NH4F的质量比从1∶2提高到1∶4这种水基润滑添加剂的平均摩擦系数先由0.3135降低到0.1435然后提高到0.2177.h-BN与NH4F的质量比为1∶3时的F-BNNSs12其摩擦系数和磨损率比h-BNNSs分别降低了 55％和75％.基于磨损痕迹的分析结果表明,F-BNNSs12良好的减磨耐磨性能可归因于:1、纳米片层间相互作用的减弱使相对滑动变得容易;2、F-BNNSs12的不相称纳米棒-纳米片结构形成滚动摩擦使其润滑性能良好;3、F-BNNSs12沉积在摩擦副表面生成不连续的润滑膜,避免了与摩擦副的直接接触.
Preparation and Tribological Properties of Fluorinated Boron Nitride Nanosheets Water-based Additive
Hexagonal boron nitride(h-BN)is a typical layered structure material with enormous po-tential in the field of friction and lubrication.Fluorinated boron nitride nanosheets(F-BNNSs)were pre-pared by constant temperature magnetic stirring and ball mill-assisted fluorination using NH4F as fluorine sourced,while h-BN as raw material.Tribological behavior of hexagonal boron nitride nanosheets(h-BNNSs)and F-BNNSs as water-based lubricant additives were evaluated under Ti6-Al-4V(TC4)/GCr15 contact conditions.The results showed that when as water based liblicant additives,the F-BNNSs pre-pared with the mass ratio of h-BN to NH4F increased from 1∶2 to 1∶4,the resulted average coefficients of friction(COFs)varied from 0.3135 to 0.1435 to 0.2177.When the mass ratio of h-BN and NH4F was 1∶3,the COFs and wear rate of F-BNNSs12 prepared were 55% and 75% lower than that of h-BNNSs,respec-tively.Based on the analysis of wear scars,it were found that the excellent friction reduction and anti-wear performance of F-BNNSs12 can be attributed to three aspects:The weakening polar interactions be-tween the nanosheet layers may facilitate the relative slidding;F-BNNSs12 incommensurate nanorod-nanosheet structure may cause rolling friction and good lubrication performance;F-BNNSs12 deposited on the surface of the friction pair favour forminga discontinuous lubricating film,to alleviate the direct con-tact for the friction pair.

inorganic non-metallic materialshexagonal boron nitridefluorinated boron nitride nanosheetswater-based lubrication additivestribological properties

王伟、常文娟、吕凡凡、解泽磊、于呈呈

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西安建筑科技大学冶金工程学院 西安 710055

季华实验室 佛山 528200

无机非金属材料 六方氮化硼 氟化氮化硼纳米片 水基润滑添加剂 摩擦学性能

国家自然科学基金陕西省科技新星基金西安市创新能力强基计划-先进制造技术攻关项目陕西省教育厅服务地方专项陕西省重点研发计划

519754502021KJXX-3221XJZZ003122JC0472023-YBGY-383

2024

10.11901/1005.3093.2023.383

材料研究学报
国家自然科学基金委员会 中国材料研究学会

材料研究学报

CSTPCD北大核心
影响因子：0.605
ISSN：1005-3093
年,卷(期)：2024.38(6)