助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   润湿角测定 的翻译结果: 查询用时:0.013秒
图标索引 在分类学科中查询
所有学科
有机化工
轻工业手工业
更多类别查询

图标索引 历史查询
 

润湿角测定
相关语句
  determining the wetting-angle
     The New Method for Determining the Wetting-angle and Its Use
     润湿角测定新方法及其应用
  “润湿角测定”译为未确定词的双语例句
     Methods: 32 specimens were prepared and 16 specimens were treated with Ar plasma for 20 minutes in plasma equipment.
     方法:将软衬材料制成10mm×10mm×2mm的试件32件,16件置于等离子处理装置中,用氩气处理20min,并对等离子体处理前后的标本进行红外光谱及润湿角测定
短句来源
     Through the measurement of wetting angle and ESCA characterization, it is confirmed that substrate has been modified.
     对经过修饰的载体进行润湿角测定和ESCA的表征,从而证明载体已经被修饰。
短句来源
     Surface tension and wetting angle measuring by suspending drops
     悬垂液滴研究及表面张力和润湿角测定
短句来源
     and hardness H_R=91~92. (3)Microstructure and wetting angle measurement-the electron micrographs have re-vealed that the hot-pressing bodies have a texture of equiaxial grains of silicon nitride inter-laced with fiberous grains.
     硬度H_R=91~92。 (3)热压氮化硅微观结构观察和润湿角测定
短句来源
  相似匹配句对
     The New Method for Determining the Wetting-angle and Its Use
     润湿测定新方法及其应用
     Surface tension and wetting angle measuring by suspending drops
     悬垂液滴研究及表面张力和润湿测定
短句来源
     angle.
    
短句来源
     Development of Wetness Angle Measuring Instrument
     润湿测量仪的研制
短句来源
     MEASUREMENT OF WETTING CONTACT ANGLE OF POWDER BY PERMEATING HEIGHT METHOD
     用透过高度法测定粉体的润湿接触
短句来源
查询“润湿角测定”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
没有找到相关例句


The present paper which has been chiefly contributed toward a studying on hot-pre-ssing silicon nitride doped with 5%(wt) magnesia is divided into three sections:(1)Manufacture——by proper choice of flowing rate of gases, temperature and duration ofnitridation, we have succeeded in preparing a raw material containing 90~95%ofα-siliconnitride.The selection of technological parameters of hot-pressing including temperature,pressure and time are described.(2)Physical and mechanical properties——the bending strength...

The present paper which has been chiefly contributed toward a studying on hot-pre-ssing silicon nitride doped with 5%(wt) magnesia is divided into three sections:(1)Manufacture——by proper choice of flowing rate of gases, temperature and duration ofnitridation, we have succeeded in preparing a raw material containing 90~95%ofα-siliconnitride.The selection of technological parameters of hot-pressing including temperature,pressure and time are described.(2)Physical and mechanical properties——the bending strength of specimens preparedunder optimun technological conditions is 7500~8200kg/cm~2 at room temperature or 7000kg/cm~2at 1100℃, and it begins obviously to decrease at 1200℃. The specimens prepared are qui- te resistant to oxidation up tO 1200℃, however at 1400℃ their oxidation rate is rapidlyincreased, the weight gain in an air environment at 1300℃ obnys roughly the parabolicrule.The abrasion coefficient is considerably small at wearing against steel №45, the dryabrasion coefficient is determined to be 0.5, and it is lowered further down to 0.09~0.11while the wearing parts have been lubricated.Thermal expansion coefficients from roomtemperature to 1200℃ are α=1.75~2.95×10~(-5). and hardness H_R=91~92. (3)Microstructure and wetting angle measurement-the electron micrographs have re-vealed that the hot-pressing bodies have a texture of equiaxial grains of silicon nitride inter-laced with fiberous grains. The wetting angle of silicon nitride by MgO .SiO_2 and 2MgO.SiO_2 melts approaches 20°.Therefore it may be reasonably thought that the liquid phaseformed at high temperatures would take an important part in sintering process. Finally, the effects of technological parameters on the strength of hot-pressing siliconnitride were also discussed, and therefrom the approaches to the improvement of hightemperature strength were suggested.

本文主要研究添加5%(重量)MgO为助熔剂的热压氮化硅系统,分为以下三部分: (1)氮化硅制备工艺。通过选择适当氮化温度、时间和气体流量,能制备α相控制在90~95%范围内的Si_3N_4粉末。同时叙述了热压工艺:包括温度、压力,保温时间等工艺参数的选择。 (2)热压氮化硅机械物理性能:室温强度在7500公斤/厘米~2~8200公斤/厘米~2,1100℃时强度为7000公斤/厘米~2,1200℃时开始下降明显,1200℃以下抗氧化性良好,1400℃氧化速率迅速增加,1300℃的氧化增重基本上符合抛物线规律;摩擦系数小,与45~*钢对磨时干摩擦系数为0.5,有润滑油情况下,为0.09~0.11;从室温到1200℃的膨胀系数α=1.75~2.95×10~(-6);硬度H_R=91~92。 (3)热压氮化硅微观结构观察和润湿角测定。电镜照片表明其织构主要由纤维状形貌颗粒和部分等轴形貌颗粒组成。Si_3N_4与MgO·SiO_2和2MgO·SiO_2的润湿角接近20°,表明它是有液相参与的烧结。 本文还对一些工艺因素变化与强度关系进行讨论,并指出进一步改进高温强度的途径。

The conventional process used to provide lubricity by phosphate-soap for ferrous metal forming was criticized in this paper.A solid lubricant based on ethyl cellulose was suggested for cold pressure working of metal. The wetting angle as well as friction and wear characteristics were examined.The results indicate that the new lubricant shows strong adhesion to the metal matrix and possesses high lubricity during cold extrusion and drawing of low-carbon steel articles. Satisfactory results have been obtained...

The conventional process used to provide lubricity by phosphate-soap for ferrous metal forming was criticized in this paper.A solid lubricant based on ethyl cellulose was suggested for cold pressure working of metal. The wetting angle as well as friction and wear characteristics were examined.The results indicate that the new lubricant shows strong adhesion to the metal matrix and possesses high lubricity during cold extrusion and drawing of low-carbon steel articles. Satisfactory results have been obtained in actual application experiments.The extrudates or drawn articles formed using the ludricant prepared from the mentioned polymer comple tely clean.The coated film can be easily removed from the metal surface after the forming operation if necessary.

作者对低碳钢塑性加工坯件表面预处理的磷化-皂化润滑工艺进行了评论,提出了用与基体金属粘附强并具有良好摩擦性能的以乙基纤维素为基础的固体膜代替磷化-皂化润滑的设想。通过润湿角的测定和摩擦试验,说明该高分子润滑剂用于黑色金属冷挤压、冷引仲加工可以取得非常满意的效果。产品表面光洁、覆盖膜层易于清除。本文还介绍了该润滑膜在工厂中应用的情况。 在低碳钢工件毛坯冷挤压、冷引伸加工前,一般都要经过碱洗、酸洗、水洗、磷化、皂化处理,使工件毛坯表面生成一层多孔的,浸填有脂肪酸皂的磷酸盐膜,方能满足加工时对润滑的要求。这种工艺工序多,对环境污染严重、加工后残余的磷化膜难于去除。 作者选择了具有良好成膜性和塑性的高分子材料,分别测定了以其为基础的溶液表面膜张力,与基体金属的接触角和固体膜的附着力,再通过摩擦试验评定其润滑性能。对比用磷化-皂化处理的和用高分子固体润滑膜的加工后工件质量,证实了用高分子固体润滑膜代替磷化-皂化润滑的设想是可行的。

Composite particles of iron red with styrene -butylacrylate with a diameter of the order of μm were prepared by suspension technology. In the preparation process, initiator, iron red and other additives were put into blend of styrene with butyacrylate firstly, then the mixture is added into water which has dissolved dispersantes. After being ultrasonic agitated 5 min, that mixture of oil with water was pre-dispersed at high speed and then moved to reactor where polymerization occurred at 70℃ for 6h.The test...

Composite particles of iron red with styrene -butylacrylate with a diameter of the order of μm were prepared by suspension technology. In the preparation process, initiator, iron red and other additives were put into blend of styrene with butyacrylate firstly, then the mixture is added into water which has dissolved dispersantes. After being ultrasonic agitated 5 min, that mixture of oil with water was pre-dispersed at high speed and then moved to reactor where polymerization occurred at 70℃ for 6h.The test data showed that energy at interface between oil and water was lower than both in oil and in water, so the iron red particles should move to interfacial zone automatically. It was lain on which state the whole energy would be the lowest that the iron red particles mostly projected into whether the oil or the water in the interfacial zone. To compare the interfacial energy between the oil and monomer with that between iron red and water, we transformed some known equation related interfacial energy to a expression γ Fe/water - γ Fe/oil =- γ water cosθ water + γ oil cosθ oil . By introducing test data of surface tension and contact angle we obtained a result that γ Fe/water < γ Fe/oil , which indicated that the iron red particles will mostly project into the water .The observational phenomena under microscope confirmed the theoretical discussion above. When the temperature was elevated from room temperature to polymerization temperature, surface tension and viscosity of the water solution increased. The surface tension and viscosity of the oil increased along with polymerization process, while the surface tension and viscosity of the water solution was almost unchangeable at the same time. The experimental results showed that the value of cosθ oil had risen along with polymerization. So it was theoretically probable after a period of polymerization that γ Fe/water > γ Fe/oil , namely, the iron red particles should remove into the oil. However, even if γ Fe/water > γ Fe/oil , it were difficult for iron red particles to return to oil again actually because the viscosity of oil was very high after a period of polymerization. As a result, the iron red particles were embedded in the polymer. The photograph of SEM of composite particles clearly showed that the iron red particles existed on the surface of composite particles. During the polymerization, the iron red particles, whose surface contained Fe 3+ , always contacted with oil where original free radical, monomer free radical and chain free radical coexisted. The FTIR of iron red extracted from composite proved that iron red had reacted with original free radical while no evidence for other free radical having reacted with iron red.

采用悬浮聚合工艺制备微米级铁红和苯乙烯 -丙烯酸丁酯共聚物复合粒子 ,通过跟踪观察体系在预分散过程的变化 ,分析相关表面张力、润湿角的测定结果 ,解释了复合粒子微观结构成因。实验测试结果显示在高速预分散过程 ,铁红以大部分伸入溶液水相的形式存在于油水界面 ;在SEM下观察到复合粒子的微观结构是铁红存在于复合粒子表面形成嵌入式结构。FTIR测试结果显示铁红在聚合过程与初级自由基发生反应

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关润湿角测定的内容
在知识搜索中查有关润湿角测定的内容
在数字搜索中查有关润湿角测定的内容
在概念知识元中查有关润湿角测定的内容
在学术趋势中查有关润湿角测定的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社