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简要地概述了表面处理技术在提高模具质量中的作用,按物理表面处理法、化学表面处理法和表面覆层处理法对模具表面处理技术进行了综述。最后指出了表面处理技术在模具发展中的重要作用。 相似文献
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介绍了阀门再制造过程中常用到的表面处理技术和工艺,同时分析了阀门再制造行业现状。总结了等离子表面处理技术和激光表面处理技术的发展现状,重点说明了等离子表面处理方法和激光表面处理方法在阀门再制造行业的应用情况,最后展望了阀门再制造表面处理技术未来的发展方向。 相似文献
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粘胶基碳纤维连续式电化学氧化表面处理(1)--碳纤维表面的物理化学性能 总被引:1,自引:0,他引:1
本文报道了用连续式电化学氧化表面处理粘胶基碳纤维表面,并测定了处理后碳纤维的单丝强度、表面浸润性、表面活性官能团含量及表面形貌等表面物理化学性能.结果表明:粘胶基碳纤维经电化学氧化表面处理可以有效地在表面产生活性官能团和提高表面粗糙度,从而有效地提高表面润湿性,但经处理后单丝强度较易下降,因此需精确控制处理的条件. 相似文献
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民用飞机钛合金紧固件表面处理的应用与研究 总被引:1,自引:0,他引:1
阐述了国内外民用飞机钛合金紧固件表面处理的现状与差异。分析了钛合金紧固件不同表面处理的作用与区别。研究了钛合金紧固件表面处理的验证方法。提出了钛合金紧固件表面处理今后的发展趋势。 相似文献
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化学表面处理技术是指运用技术手段将所要改进的物件表面进行化学性质上的改变,如通过在物件表面进行涂层,电解或进行化学反应的方式改变物件表面化学组成等方法进行物件的表面处理。作为化学的一个分支学科,化学材料表面处理在近半个世纪以来得到了长足的发展。本文着重介绍了金刚石薄膜涂层技术、化学镀技术、热喷涂技术、激光表面处理技术等多个表面处理技术的特点和各自的优缺点,介绍了化学材料表面处理的应用对象。 相似文献
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本文报道了用连续式电化学氧化表面处理粘胶基碳纤维表面,并测定了处理后碳纤维的单丝强度,表面浸润性,表面活性官能团含量及表面形貌等表面物理化学性能。结果表明:粘胶基碳纤维经电化学氧化表面处理可以有效地在表面主生活性官能团和提高表面粗糙度,从而有效地提高表面润湿性,但经处理后单丝强度较易下降,因此需精确控制处理的条件。 相似文献
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塑料塔填料表面改性技术 总被引:3,自引:0,他引:3
塑料塔填料表面能低,润湿性差,不利于传质。增大表面粗糙度以提高表面能与改变表面分子结构而增加表面极性是改善塑料塔填料分离性能的两个主要途径。本文着重介绍了表面糙化、表面极化、表面接枝及等离子体表面处理等表面改性技术。 相似文献
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塑料塔填料表面改性技术进展 总被引:1,自引:0,他引:1
张近 《现代塑料加工应用》1999,11(2):51-55
分析和讨论了塑料塔填料表面性能及其润湿条件 ,指出改变表面分子结构以增加极性与加大表面粗糙度而提高表面张力是改善塑料塔填料表面润湿性能的主要途径 ,并介绍了表面糙化、表面极化、表面接技及等离子体表面处理等表面改性技术 相似文献
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《Journal of Adhesion Science and Technology》2013,27(10):1283-1306
The effect of surface chemistry and rugosity on the interfacial adhesion between Bisphenol-A Polycarbonate and a carbon fiber surface subjected to surface treatment to add surface oxygen groups was investigated. The surface oxygen content of PAN based intermediate modulus IM7 carbon fibers was varied by an oxidative surface treatment. The oxygen content of the carbon fiber surface increased from 4 to 22% by changing the degree of surface treatment from 0 to 400% of nominal commercial surface treatment levels. The oxidative surface treatment also causes an increase in surface roughness by creating pores and fissures in the surface by removing carbon from the regions between the graphite crystallites. To decouple the effects of surface roughness and the surface oxides on the interfacial adhesion, the oxidized fiber surface was passivated via hydrogenation at elevated temperature. Thermal hydrogenation removes the oxides on the surface without significantly altering the surface topography. The results of interfacial adhesion tests indicate that an increase in the oxygen content of the fiber does not increase the fiber-matrix interfacial adhesion significantly. Comparing adhesion results between oxidized and hydrogen passivated fibers shows that the effect of the surface roughness on the interfacial adhesion is also insignificant. Overall, dispersive interactions alone appear to be the primary factor in adhesion of carbon fibers to thermoplastic matrices in composites. 相似文献
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对亲水表面、裸铝表面和疏水表面上结霜和融霜排液过程进行实验研究,分析了表面特性对冷凝水珠冻结、霜层生长和融霜排液的影响。结果表明:疏水表面上冷凝水珠呈规则球缺状、冻结较晚,而亲水表面和裸铝表面上冷凝水珠形状不规则;相比于亲水表面和裸铝表面上平整霜层,疏水表面上霜层不平整,有凹穴和凸起;疏水表面上霜层平均厚度增长较亲水表面和裸铝表面缓慢;在湿空气温度和冷面温度较低的情况下,表面特性对霜层生长的影响减弱;亲水表面具有较好的排液效果,其循环再结霜量最小。 相似文献
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Effect of Surface Treatment on Flow Boiling Heat Transfer Coefficient in CaSO4 Containing Water
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RENXiaoguang 《中国化学工程学报》2006,14(1):122-126
This paper reports the influence of heat transfer surface treatment on the formation of calcium sulphate deposit during flow boiling heat transfer. The surface of several test heaters was treated by surface modification techniques, such as dynamic mixing magnetron sputtering [DLC (diamond-like carbon), DLC-F (diamond-like carbon-fluorine) and AC (amorphous carbon)] and polishing to reduce surface energy. The results showed that heat transfer surface with low surface energy experienced significant reduction of formation of CaSO4 deposit. (1) Magnetron sputtering stainless steel heat transfer surface with DLC, DLC-F and plasma arc sputtering with AC did not change the surface roughness, but they reduced surface energy and improved heat transfer coefficient, so hindered CaSO4 deposit formation significantly. The DLC-F surface performed better than the DLC surface. (2) Surface energy played an important pole in improving heat transfer coefficient. The less the surface energy the more significant the heat transfer coefficient improved with other experimental conditions identical. (3) The polished surface improved the roughness of the heater, but owing to the high surface energy it was not better than the DLC-F surface for a long-term consideration on improving the heat transfer coefficient. 相似文献
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M. Jayabalan 《大分子材料与工程》1986,139(1):33-37
Analytical studies on surface damage of PVC sheets due to weathering were carried out. PVC sheets which contain embossed and smooth surface which were subjected to cyclic weathering conditions of humidity and temperature were analysed. PVC sheets prepared with di-2-ethylhexyl phthalate as plasticizer undergo leaching of plasticizer; the leaching being high in smooth and less in embossed surface. The presence of plasticizer on the surface was detected by Attenuated Total Internal Reflectance Infrared Spectrophotometry (ATIR). The higher the leaching in smooth surface, the higher the surface damage in the embossed surface. The higher damage is ascribed to surface brittleness whereas the lower damage is ascribed to the surface plasticization. The surface damage was assessed by photomicrography. 相似文献
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纳米氧化镁粉体表面改性技术的研究进展 总被引:1,自引:0,他引:1
简述了纳米氧化镁表面改性的原因,并对纳米氧化镁的表面改性方法(物理改性和化学改性法):即表面包覆改性法、表面化学改性法、机械力化学改性法、沉淀反应改性法、外膜层改性(胶囊)法、和高能表面改性法进行了概述.着重介绍了表面活性剂、偶联剂在纳米氧化镁表面改性方面的应用,并对纳米氧化镁改性方面的研究提出了建议. 相似文献
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