共查询到18条相似文献,搜索用时 125 毫秒
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Al2O3—Fe2O3复相多孔陶瓷的强韧化研究 总被引:2,自引:0,他引:2
本文介绍了采用不锈钢纤维及化学镀镍铁粉增韧补强Al2O3-Fe2O3复相多孔陶瓷的方法;研究了不锈钢纤维含量及化学镀镍铁粉对材料性能的影响。探讨了其韧化机理;用该材料进行了成形模具对比试验。结果表明,不锈钢纤维和化学镀镍铁粉均对材料有明显的强韧化效果,尤其是两者的复合强韧化效果更显著。 相似文献
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英国Aston大学的Dennis研究了各种要求高耐蚀、高耐磨密封镀层材料的性能,结果发现,在400。C热处理的化学镀镍层、化学镀镍 SiC复合镀层、化学镀镍 SiC(400℃热处理)、Ni—Cr—B合金,碳化钒层、080A40硼化钢、WC Ni W—Cr碳化物层、化学镀镍 TiN(PVD法)和氮化的不锈钢等材质中,化学镀镍 TiN组合镀层具有最好的耐磨性能(4公斤 相似文献
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本文对化学镀镍及化学镀镍磷基质中SiO2与Cr2O3的共沉积进行了研究。微粒在不断生长的膜层中共沉积引起了新的化学复合镀层的出现,这些复合镀层许多都具有优异的耐磨及耐蚀性能。通过选取镀层合金/复合微粒/金属基体的组分可改进镀层,获得所需的性能,以满足特别的需求。在对这些复合镀层的应用需求正在迫近与增长的同时,其市场正在迅速扩张。本文开发出了一种合适的复合化学镀镍液,并通过维氏硬度法对化学复合镀镍层进行了表征。采用动电位极化及交流阻抗法测定了镀层的Taber耐磨性能及耐蚀性能。采用SEM及XRD对复合镀层的表面形貌进行了分析。 相似文献
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化学镀Ni-P-Cr2O3和Ni-P-SiO2复合镀层的研究 总被引:2,自引:0,他引:2
KARTHIKEYAN S SRINIVASAN K N VASUDEVAN T JOHN S 《电镀与涂饰》2007,26(1):1-6
本文对化学镀镍及化学镀镍磷基质中SiO2与Cr2O3的共沉积进行了研究.微粒在不断生长的膜层中共沉积引起了新的化学复合镀层的出现,这些复合镀层许多都具有优异的耐磨及耐蚀性能.通过选取镀层合金/复合微粒/金属基体的组分可改进镀层,获得所需的性能,以满足特别的需求.在对这些复合镀层的应用需求正在迫近与增长的同时,其市场正在迅速扩张.本文开发出了一种合适的复合化学镀镍液,并通过维氏硬度法对化学复合镀镍层进行了表征.采用动电位极化及交流阻抗法测定了镀层的Taber耐磨性能及耐蚀性能.采用SEM及XRD对复合镀层的表面形貌进行了分析. 相似文献
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Fouling on food contact surfaces (e.g. heat exchangers, work tables, conveyors) during food processing has a significant impact on operating efficiency and can promote biofilm development. Processing raw milk on plate heat exchangers results in significant fouling of proteins as well as minerals, and is exacerbated by the wall heating effect. The surface of 316L stainless steel heat exchanger plates was modified to resist fouling during food processing. An electroless nickel plating process was used to co-deposit fluorinated nanoparticles onto 316L stainless steel. The ability to resist fouling was demonstrated on a pilot plant scale plate heat exchanger. The fluorinated nanoparticle modified steel reduced surface energy from 41.4 to 24.7 mN/m, and reduced foulant accumulation by 97%. The anti-fouling coating was demonstrated to improve heat transfer efficiency. Repeatability studies were performed and confirmed that the EN-PTFE surface coating maintained its anti-fouling properties through 10 independent processing runs. Co-deposition of fluorinated particles during electroless nickel plating represents an effective and commercially scalable method to prepare anti-fouling coatings on stainless steel. 相似文献
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B.C. Kim P.C. Innis G.G. Wallace C.T.J. Low F.C. Walsh W.J. Cho K.H. Yu 《Progress in Organic Coatings》2013
Woven nylon Lycra® has been coated with finely-divided electroless nickel-phosphorus, polypyrrole and electroless nickel/polypyrrole to produce flexible and electrically conductive textiles. The coated textiles were tested for their electrochemical activity, electrical resistivity and resistivity in response to mechanical strain. Pre-dyeing the textile with poly(2-methoxyaniline-5-sulfonic acid) (PMAS) prior to electroless metallization by electroless nickel and via chemical polymerization of polypyrrole was found to be beneficial in enhancing the resultant coating as well as stabilizing surface resistance responses when exposed to a wide range of strain. The mass gain due to the nickel coating was found to increase linearly with deposition time. The surface resistivity of the coated textile was found to decrease at longer nickel deposition times. 相似文献
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以邻二氯苯、邻氯甲苯、二氧化碳为原料,N,N-二甲基甲酰胺为溶剂,铝、镍网及化学镀镍膜为阳极,不锈钢网为阴极,牺牲阳极法制备邻苯二甲酸、邻甲苯甲酸,邻苯二甲酸的产率为16%,电流效率为48%。 相似文献
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介绍了一种容积约为200 mL的微型密闭滚筒的设计,其主要包括以下部件:丙烯酸管(长60 mm、外经76 mm、壁厚3 mm)及两侧圆盘,不锈钢中轴,不锈钢阴极棒、镍阳极盘,特富龙套筒、螺帽和滑轮.采用该滚筒对2 g化学镀镍后的人造金刚石颗粒(粒径为100~250μm)进行滚镀镍.化学镀镍前,人造金刚石颗粒按如下步骤前... 相似文献
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不同材料表面镍-磷-锌盐纳米复合化学镀层性质的比较 总被引:2,自引:0,他引:2
研究比较了D310硅钢片和A3钢片表面Ni-P-Zn3(PO4)2,Ni-P-ZnSnO3和Ni-P-ZnSiO3纳米复合化学镀层的外貌和性质。用扫描电子显微镜(SEM)观察外貌:称重法测定厚度,通过10%NaCl溶液,1%H2S气体加速腐蚀试验,10%,CuSO4溶液点滴试验,饱和KCl溶液循环伏安(CV)试验,抗粘性试验及抗高温氧化试验等多种手段测定其性能。结果表明:纳米复合化学镀层的性能优于镍-磷镀层和其它微米复合镀层。 相似文献