钛酸锶陶瓷表面Ni—P金属化工艺的研究

本文对陶瓷表面的预处理和化学镀工艺进行了实验研究， 确定了最佳的工艺参数， 并成功地在 Ｓｒ Ｔｉ Ｏ３ 陶瓷表面制备出结合力良好的 Ｎｉ Ｐ 合金镀层。实验表明， 镀层的可焊性随含磷量的增加而下降。通过热处理， 镀镍电极电容器的损耗和表面电阻明显降低。     

稀土对电沉积Ni—W—B—SiC复合镀层组织结构及性能的影响

研究了加入稀土对电沉积Ｎｉ－Ｗ－Ｂ－ＳｉＣ复合镀层的成份,结构,表面形貌,硬度等性能的影响规律。结果表明,加入稀土有利于ＳｉＣ与Ｎｉ－Ｗ－Ｂ的共沉积,使镀层结晶细化,ＲＥ－Ｎｉ－Ｗ－Ｂ－ＳｉＣ复合镀层的硬度高于Ｎｉ－Ｗ－Ｂ－ＳｉＣ复合镀层。     

电沉积RE—Ni—W—B—SiC复合镀层的性能

研究了ＲＥ－Ｎｉ－Ｗ－Ｂ－ＳｉＣ复合材料的耐磨性和耐蚀性。结果表明，在适当的镀液组成及工艺条件下，可获得组成为ＲＥ－Ｎｉ－Ｗ－Ｂ４．８％Ｂ－１５％ＳｉＣ的复合材料镀层。在镀液中加入少量稀土，能提高复合镀层的硬度和耐磨性；热处理温度对复合材料镀层的硬度和耐磨性有较大的影响，硬度和耐磨性随热处理温度的升高而增加。当热处理温度达到４００℃时，复合镀层的硬度达到最佳值，耐磨性在５００℃时为最好。磨损实验表     

钕铁硼磁性材料表面耐蚀镀层

介绍了Ｎｄ－Ｆｅ－Ｂ磁性材料表面镀Ｎｉ－Ｐ（电镀和化学镀）、镀Ｎｉ－Ｆｅ（脉冲镀和电镀）、镀铬（六价铬和三价铬镀液电镀）的主要工艺条件和镀层的特点。     

化学镀Ni—W—B非晶质电阻膜的研究

研究了化学镀Ｎｉ－Ｗ－Ｂ合金的工艺及性能，结果表明，在Ｎｉ－Ｂ槽液中加入一定量的钨酸钠溶液，不仅能得到含钨、硼的镀层，而且还能提高镀液的沉积速度；Ｎｉ－Ｗ－Ｂ合金层在镀态时为非晶态结构，它的电阻率随钨含量的增加而增大，随镀层厚度的增加而降低。     

化学镀Co-Ni-P合金镀层增厚过程中结构和形貌的改变

用电子探针，透射电镜，旋转阳极Ｘ射线衍射仪和原子力显微镜分析了观察了化学镀Ｃｏ－Ｎｉ－Ｐ合金镀层的成分，结构和表面形貌。化学镀Ｃｏ－Ｎｉ－Ｐ合金开始晶态沉积，表面由“圆锥峰”组成。镀层厚度是按叠层生长方式增加的。     

用化学复合镀工艺制备的Ni—P—SiC镀层材料的组织,热处理和性能

使用化学复合镀工艺获得了Ｎｉ－Ｐ－ＳｉＣ金属陶瓷镀层材料，镀层中ＳｉＣ质点分布均匀，利用差热分析曲线讨论了可获得的好耐磨性能热处理制度，比较了Ｎｉ－Ｐ－ＳｉＣ和Ｎｉ－Ｐ镀层的硬度和耐磨性能。     

化学镀Ni—P合金新技术在工业和烟草机械中的应用

综述了化学镀Ｎｉ－Ｐ合金的机理,工艺条件（预处理,镀液组成,温度,ｐＨ值和热处理）和镀层性能（硬度,耐蚀性,耐磨性）并展现其在工业和烟草机械中的应用。     

SiC微粒对Ni—W—SiC复合镀层工艺及性能的影响

讨论了工艺参数对镀层成份的影响及热处理方式对Ｎｉ－Ｗ－ＳｉＣ复合镀层组织结构、硬度和耐磨性的影响。结果表明，采用电沉积工艺，可得到含Ｎｉ５０％￣５５％、Ｗ４２％￣４５．４％、ＳｉＣ３．０％￣７．６％的复合镀层。Ｎｉ－Ｗ－ＳｉＣ复合镀层在镀态时为非晶态，经５００℃热处理１ｈ或氮碳共渗后，镀层已晶化，产生了镍固溶体和少量的γ－ＦｅＮｉ相，经氮碳共渗后还有ＷＣ和ＷＮ相。ＳｉＣ微粒的加入显著地提高了Ｎｉ－     

高温合金表面激光熔铸镍基合金涂层的组织与耐磨性能

研究了高温合金ＧＨ３３表面激光熔铸镍基合金涂层的组织和耐磨性能。结果表明,基材对涂层合金的稀释作用较小;涂层与基材之间形成良好的冶金接合;涂层基体组织为γ－Ｎｉ枝晶,枝晶间为γ－Ｎｉ、Ｍ２３（ＣＢ）６、Ｎｉ３Ｂ、Ｃｒ２Ｂ、ＣｒＢ、ＷＣ等;涂层耐磨性能的平均值较基材提高４倍以上。     

BaTiO3陶瓷表面金属化的研究

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稀土铈对化学沉积Co-Ni-B合金镀层结构和性能的影响

研究了稀土铈对化学沉积Co-Ni-B合金层化学组成、结构和性能的影响。结果表明：微量稀土铈的加入提高了镀层中钴的含量，降低了镍和硼的含量；使镀层由非晶态转变为品态；稀土铈也明显地提高了镀层的显微硬度，在一定的范围内，镀液中稀土铈添加量越多，镀层的铈含量和显微硬度也越高；稀土铈还提高了镀层的饱和磁化强度，降低了剩余磁化强度和娇顽力，含铈镀层显示出了良好的软磁性能。     

钛基体表面处理对无氰电刷镀银结合力的影响

采用无氰电刷镀银溶液，通过对钛基体进行喷砂、机械打磨、化学刻蚀等表面处理，电镀前再经过表面活化，可有效地提高钛基体与镀银层之间的结合力。     

Properties of Electroless Ni–B and Ni–P/Ni–B Coatings Formed on Stainless Steel

In this study, Ni–P/Ni–B duplex coatings and Ni–B single layer were deposited on 410 stainless steel by the electroless process. The surface morphology and cross section observations were analyzed using scanning electron microscopy and optical microscopy. The results showed that by using the Ni–high P layer under the Ni–B deposit, the hardness value was increased. Also, the surface roughness of Ni–high P/Ni–B duplex coating was lower than the surface roughness of the Ni–B single layer. In addition, by using the Ni–high P layer as an intermediate layer prior to Ni–B coating, the surface morphology could be compressed. The mass loss diagram and the worn surfaces indicated that the Ni–high P/Ni–B duplex coating was the best wear resistant among the other coatings.     

Preparation,Characterization and Mechanical Properties of Cu-Sn Alloy/Graphite Composites

Ni-B coating was prepared on the surface of graphite particles using the electroless plating method. The Ni-B coating was composed of spherical grains with average diameter of 80 nm. The phases of Ni-B coating were indexed as nanosized crystal Ni phase and amorphous Ni-B phase. Cu-Sn alloy/graphite composites with 0.5, 1.0, 1.5, and 2.0 wt pct graphite contents were synthesized by the powder metallurgy method. Ni-B coating improved the wettability and bonding strength between the Cu-Sn alloy and graphite. The composite with Ni-B coated graphite exhibited higher density, hardness, and compression strength compared with the composites with bare graphite. The crack propagation mechanism of the composites was also analyzed.     

Replacement of Solid Chrome Plating with Boride Composite Coatings Based on Nickel and Iron

The feasibility of replacing solid chrome plating with a composite electrolytic coating based on Ni and Fe is discussed. The physical and mechanical properties of such a coating are shown to be on a par with or superior to those of solid chrome plating. The proposed coating costs less than does chrome plating.     

Effect of Rare Earth on Microstructure of Vacuum Melting Ni-Based Self-Fluxing Alloy Coatings

The Ni-based self-fluxing alloy coating containing RE was acquired by the technique of vacuum melting on the hypoeutectoid steel (Fe-0.45% C) matrix. By X-ray diffraction, SEM and EDX, the microstructure and phase structure of section of coating and the microstructure near the interface between coating and matrix were investigated, and the effect of RE on microstructure of coating was also discussed. The results show that the microstructure of the NiCrBSi alloy coating is composed of Ni-based solid solution and a lot of massive, globular and needle secondary phases CrB, Ni3B, Cr7C3, Cr23C6 among the solid solution. The metallurgical binding between steel matrix and coating is realized. RE makes needle phase of alloy coating vanish. New phases of NiB and Cr6.5Ni2.5Si are precipitated from alloy coating, and secondary phases of alloy coating are sphericized. Consequently, RE also hinders the diffusion of Ni, Cr and Si atoms from coating to matrix and Fe atoms from matrix to coating, holds back the dilution of Fe for NiCrBSi alloy coating, and assures the chemical composition of the alloy coating.     

温度对化学镀Ni-Fe-P合金性能的影响

研究了温度对化学镀Ni-Fe-P合金性能的影响,着重探讨了在不同温度下对其镀速、镀层硬度、镀层形貌、镀层成分以及耐腐蚀性的影响.结果表明：当温度在87℃时,镀层沉积速度最快,镀层硬度达到最大,镀层表面颗粒最均匀,镀层成分中含铁量、含硅量最大,而且该温度下的耐腐蚀性最好.     

A Precious Metal-Free Electroless Technique for the Deposition of Copper on Carbon Fibers

This article introduces a new technique of electroless copper deposition on carbon fibers in the absence of precious metal as the catalyst. Copper layers were electrolessly deposited on the surface of carbon fiber without using the conventional palladium or silver catalyst to initiate redox reactions leading to metallization. This new technique shows that nickel seeds can serve as excellent catalysts to expedite the redox reactions. By performing experiments, parameters such as activation temperature, nickel ion concentration, and pH value were optimized, and an orbicular copper plating layer of carbon fiber was obtained in the copper sulfate salt-based conventional electroless solution. The surface morphology of copper coating was characterized by scanning electron microscopy and X-ray diffraction. The results indicate that uniform and smooth copper coating could be obtained by the new precious-metal free activation process. The resulting copper coating thickness is about 1???m.