• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >WS2 nanoadditized lubricant for applications affected by hydrogen embrittlement
【24h】

WS2 nanoadditized lubricant for applications affected by hydrogen embrittlement

机译：WS2纳米添加剂润滑剂，适用于受氢脆影响的应用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Hydrogen is one of the cleanest available vehicle fuels but its small atomic size allows it to diffuse readily through the lattice of solid materials, which can cause catastrophic failure in high strength steels. Metal embrittlement has been identified as a major consequence of hydrogen uptake and represents an extra challenge for lubricated tribological parts in fuel cell vehicles, hydrogen compressors, storage tanks, dispensers and wind turbines that are normally subjected to high stresses. This study has found WS2 nanoparticles as an effective additive candidate to impede the permeation of hydrogen into rolling element bearings at high temperatures and pressures. Compared to the pure polyalphaolefin (PAO) base oil, WS2 nanoadditized oil reduced the concentration of permeated hydrogen in the bearing steel and led to controlled wear and smoother tracks. These effects are attributed to the formation of a chemical tribofilm on the wear track which reduces hydrogen embrittlement and extends the life of steel through several mechanisms: (1) its continuous generation impedes formation of nascent catalytic surfaces during rubbing and thus prevents the decomposition of oil/water molecules and generation of atomic hydrogen; (2) acts as a physical barrier to hydrogen permeation through the wear track; (3) the low coefficient of diffusion of hydrogen through the tungsten compounds found in the tribofilm further reduces hydrogen permeation; (4) some of the atomic hydrogen is used up in redox reactions during the formation of the tribofilm and (5) the tribofilm reduces the total amount of water in the steel formed by the reaction of hydrogen atoms with oxides and thus extends the fatigue life. WS2 nanoadditized lubricants can lead to improved profitability and sustainability of the emerging renewable energy industry.
机译：氢是最清洁的可用车辆燃料之一，但是氢原子的大小很小，因此它可以很容易地扩散通过固体材料的晶格，这会在高强度钢中造成灾难性的破坏。金属脆化被认为是吸收氢的主要结果，对于通常承受高应力的燃料电池汽车，氢压缩机，储罐，分配器和风力涡轮机中的润滑摩擦部件来说，这是一个额外的挑战。这项研究发现WS2纳米颗粒是一种有效的添加剂候选物，可以阻止氢在高温和高压下渗透到滚动轴承中。与纯聚α-烯烃（PAO）基础油相比，WS2纳米添加剂油降低了轴承钢中渗透氢的浓度，并导致可控的磨损和更平滑的轨道。这些影响归因于在磨损轨道上形成的化学摩擦膜，该摩擦膜减少了氢脆并通过多种机理延长了钢的寿命：（1）钢的连续生成阻碍了摩擦过程中新生的催化表面的形成，从而防止了油的分解/水分子和氢原子的产生; （2）充当物理途径阻止氢通过磨损道的渗透; （3）氢通过摩擦膜中发现的钨化合物的低扩散系数进一步降低了氢的渗透; （4）摩擦膜形成过程中的某些原子氢在氧化还原反应中被用尽;（5）摩擦膜减少了氢原子与氧化物反应形成的钢中水的总量，从而延长了疲劳寿命。 WS2纳米添加剂润滑剂可以提高新兴可再生能源行业的盈利能力和可持续性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号