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Analysis of Nanof luids as Cutting Fluid in Grinding EN-31 Steel 被引量:2
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作者 V.Vasu K.Manoj Kumar 《Nano-Micro Letters》 SCIE EI CAS 2011年第4期209-214,共6页
Grinding requires high specific energy which develops high temperatures at wheel work piece interface. High temperatures impair work piece quality by inducing tensile residual stress, burn, and micro cracks. Control o... Grinding requires high specific energy which develops high temperatures at wheel work piece interface. High temperatures impair work piece quality by inducing tensile residual stress, burn, and micro cracks. Control of grinding temperature is achieved by providing effective cooling and lubrication. Conventional flood cooling is often ineffective due to enormous heat generation and improper heat dissipation. This paper deals with an investigation on using TRIM E709 emulsifier with Al_2O_3 nanoparticles to reduce the heat generated at grinding zone. An experimental setup has been developed for this and detailed comparison has been done with dry, TRIM E709 emulsifier and TRIM E709 emulsifier with Al_2O_3 nanoparticles in grinding EN-31 steel in terms of temperature distribution and surface finish. Results shows that surface roughness and heat penetration were decreased with addition of Al_2O_3 nanoparticles. 展开更多
关键词 GRINDING Al2O3 nanoparticle Temperature distribution Surface roughness en-31 steel
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露兜簕根化学成分研究 被引量:6
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作者 刘嘉炜 彭丽华 +2 位作者 冼美廷 成金乐 陈蔚文 《中草药》 CAS CSCD 北大核心 2012年第4期636-639,共4页
目的对露兜簕Pandanus tectorius根进行化学成分研究。方法采用硅胶柱、氧化铝柱色谱和制备薄层等色谱方法对露兜簕根部位化学成分进行分离纯化,根据化合物的NMR、MS、IR等波谱数据和理化性质鉴定分子结构。结果从露兜簕根乙醇提取物分... 目的对露兜簕Pandanus tectorius根进行化学成分研究。方法采用硅胶柱、氧化铝柱色谱和制备薄层等色谱方法对露兜簕根部位化学成分进行分离纯化,根据化合物的NMR、MS、IR等波谱数据和理化性质鉴定分子结构。结果从露兜簕根乙醇提取物分离获得1个新化合物(1)和5个已知化合物(2~6),分别鉴定为3-酮-24(31)-烯-28,29-去甲基环木菠萝烷(1)、3-酮-24(31)-烯-环木菠萝烷(2)、3-酮-24(31)-烯-28-去甲基环木菠萝烷(3)、β-豆甾醇(4)、β-谷甾醇(5)和棕榈酸(6)。结论化合物1为新化合物,命名为环露兜酮(cyclotectorone),环木菠萝烷型三萜化合物1~3均为首次从露兜簕根部位中分离鉴定。 展开更多
关键词 露兜簕 环木菠萝烷型三萜 3-酮-24(31)-烯-28 29-去甲基环木菠萝烷 环露兜酮 3-酮-24(31)-烯-环木菠萝烷
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