Influence of the heat treatment on the tribological behavior of a Ni–P–BN(h) autocatalytic composite coating

León, O.A.; Staia, M.H.; Hintermann, H.E.

doi:10.1016/s0257-8972(99)00438-7

Cited by 29 publications

(6 citation statements)

References 8 publications

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“…This structure is similar to that of graphite and molybdenum disulfide (MoS 2 ), which are highly successful solid lubricants, and the mechanism behind their effective lubricating performance is understood to be owing to easy shearing along the basal plane of the hexagonal crystalline structures [23]. Leŏn et al [19][20][21][22] investigated the wear mechanism of Ni-P/BN(h) autocatalytic coatings that deposited on AISI 316L stainless steel and found that the addition of BN(h) particles, with an average particle size of 5.16 µm, could reduced friction and wear. Their results showed that the frictional and mechanical properties of the composite coatings were affected by the BN(h) particle content in the coating and the composite coating which contained approximately 35% BN(h) exhibited the lowest friction coefficient of 0.…”

Section: Introductionmentioning

confidence: 93%

“…In order to improve further the properties (mechanical and tribological) of electroless Ni-P coatings, numerous composite coatings based on electroless nickel-phosphorus matrix are investigated. By co-deposition of hard particles such as Al 2 O 3 , B 4 C, WC, SiC and SiO 2 [6][7][8][9][10][11][12][13], higher hardness and improved wear resistance are obtained, and, by incorporation of such soft particles as PTFE, graphite, MoS 2 , carbon nanotube, and hexagonal form of boron nitride (BN(h)) [14][15][16][17][18][19][20][21][22], the friction coefficient of electroless Ni-P coatings is modified. Vojtěch et al [6] investigated the sliding wear behavior of electroless Ni-P/Al 2 O 3 and Ni-P/SiC coatings deposited on an aluminium-silicon casting alloy.…”

Section: Introductionmentioning

confidence: 99%

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The effect of incorporated self-lubricated BN(h) particles on the tribological properties of Ni–P/BN(h) composite coatings

Hsu

Hou

Ger

et al. 2015

Applied Surface Science

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

The effect of incorporated self-lubricated BN(h) particles on the tribological properties of Ni–P/BN(h) composite coatings

Hsu

Hou

Ger

et al. 2015

Applied Surface Science

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“…Leon vd. [15][16][17], h-BN takviyeli akımsız nikel kompozit kaplamada, ısıl işlemin kompozit kaplamaların tribolojik özelliklerine etkisini incelemişlerdir. Hacimce %33 h-BN içeren kaplamalarda en iyi aşınma sonuçları, 400°C'de ısıl işlem görmüş numunelerde elde edilmiştir.…”

Section: Heat Treatment Effect Of Hexagonal Boron Nitride Reinforced unclassified

“…İlave edilen parçacık cinsi bu parametrelerin en önemlileri arasındadır. Birçok çalışmada SiC [7,8], SiO 2 [9,10], TiO 2 [11,12], Al 2 O 3 [13,14] ve h-BN [15][16][17][18][19][20] gibi parçacıkların akımsız nikel kaplamalara etkileri incelenmiştir. Al 2 O 3 , B 4 C, WC, SiC ve SiO 2 gibi sert parçacıkların, kaplamaların sertlik ve aşınma direncini arttırdığı, politetrafloroetilen (PTFE), grafit, karbon nanotüp ve MoS 2 gibi katı yağlayıcı parçacıkların, kaplamaların kendini yağlama özelliğini geliştiği belirlenmiştir [21].…”

Section: Heat Treatment Effect Of Hexagonal Boron Nitride Reinforced Electroless Nickel Coatings 1 Giriş (Introduction)unclassified

Heat Treatment Effect of Hexagonal Boron Nitride Reinforced Electroless Nickel Coatings

2019

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ÖZETBu çalışmada, 1050 alüminyum alaşım yüzeyine hekzagonal bor nitrür (h-BN) ilaveli akımsız nikel-fosfor (Ni-P) kompozit kaplama uygulanmış ve 400°C'de 1 saat süreyle yapılan ısıl işlemin kaplama yapısına etkisi incelenmiştir. Kompozit kaplamalar, üç farklı miktarda (1, 5 ve 10 g/L) h-BN içeren çözeltide yapılmıştır. Kaplamalara, Taramalı Elektron Mikroskobu (SEM), X-ışını spektroskopisi (EDS), X-ışını kırınımı (XRD) analizleri yapılmıştır. Bunlara ilaveten yüzey pürüzlülükleri, sertlikleri ölçülmüş ve %3,5 sodyum klorür (NaCl) çözeltisi içinde elektrokimyasal korozyon deneyleri yapılmıştır. Amorf yapıdaki nikel matrisin ısıl işlem ile kristalin yapıya dönüştüğü tespit edilmiştir. Isıl işlem sonucu sertlik değerleri artmış ve en yüksek sertlik değerine (1015 ± 41 HV 0,05 ), 10 g/L h-BN içerikli çözeltide yapılan kaplamada ulaşılmıştır. Elektrokimyasal deneylerde ise ısıl işlemin kompozit kaplamaların korozyon direncini azalttığı belirlenmiştir. ABSTRACTIn this study, surfaces of 1050 aluminium alloy were coated with hexagonal boron nitride (h-BN) reinforced electroless nickel-phosphorus (Ni-P) composite coating and the effect of heat treatment on the coating structure for 1 hour at 400°C was investigated. Composite coatings were performed in solutions which consist of three different compositions (1, 5 and 10 g/L) of h-BN. A scanning electron microscope (SEM), X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analysis were performed on the composite coatings. Additionally, surface roughness and hardness were measured and finally, electrochemical corrosion experiments were conducted in 3.5% sodium chloride (NaCl) solution. The heat treatment process has identified a transition from the amorphous structure to crystalline in the nickel matrix. The result of heat treatment, hardness values increased and the highest value of hardness (1015 ± 41 HV 0.05 ) was achieved with the specimen coated in 10 g/L h-BN solution. In the electrochemical experiments, a reduction in corrosion resistance of the composite coatings was determined as a result of heat treatment.

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“…Electroless plating provides a good alternative to electroplating in that it is able to evenly coat complex shapes, with holes and recessed areas, and does not have the same limitations stemming from the uneven throwing power of the current in electroplating. An additional advantage of electroless plating is that other metals [38][39][40] and/or secondphase particles, such as carbides, diamonds, or polytetrafluoroethylene (PTFE), can be codeposited during the plating process to create composites to improve the hardness, abrasive properties, or lubricity of the final composite coating [41][42][43]. Unlike electroplating, the environmental impact of electroless plating from an aqueous solution is of serious concern due to the limited life of the deposition bath, a problem aggravated by magnesium's high reactivity and the need to replenish depleted metallic ions.…”

Section: Current Coating Technologiesmentioning

confidence: 99%

Ionic Liquid Treatments for Enhanced Corrosion Resistance of Magnesium‐Based Substrates

Petro

Schlesinger

Song³

2010

Modern Electroplating

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SONG INTRODUCTIONMagnesium (Mg) is the eighth most abundant element on earth, possessing several advantageous properties including a high strength to weight ratio and one of the lightest metals with a density that is only two-thirds that of aluminum and one-fourth that of iron at 1.74 g cm À3 . Additional properties that contribute to magnesium's versatility in the automotive, electronic, and aerospace industries include a high thermal conductivity, high dimensional stability, good electromagnetic shielding characteristics, high damping characteristics, good machinability, and easy recyclability [1]. These properties make the utilization of magnesium of particular interest to the automotive and aerospace industries where the weight reduction provides a simple means to achieve higher fuel efficiencies without sacrificing structural strength.Despite its many valuable properties, magnesium remains a very reactive element, prone to a number of undesirable properties, including poor corrosion and wear resistance, poor creep resistance, and high chemical reactivity, which have limited its wider industrial use. As such, automobiles currently possess few magnesium cast parts, averaging only a few pounds per car. Pure magnesium corrodes rapidly in humid atmospheric and/or aqueous environments where anions such as Cl À , Br À , I À , and SO À x promote local and generalized corrosion [2][3][4][5][6][7][8][9][10][11][12]. Compounds like alcohols, ethers, and phenols also attack magnesium [13]. Although alloying magnesium with elements such as manganese, aluminum, zinc, zirconium, and rare earths [14,15] can improve its properties, magnesium and its alloys continue to be extremely susceptible to galvanic corrosion, which can cause severe pitting in the metal, resulting in decreased mechanical stability and an unattractive appearance of the surface. Although uniform attack [16][17][18] is generally the most prevalent form of electrochemical corrosion, occurring with equal intensity over the entire surface of the metal, in the case of magnesium, especially pure magnesium, the partially protective surface film makes localized galvanic [19][20][21][22][23][24] and pitting corrosion [25-35] more common and worrisome, largely due to the difficulty in their detection and suppression. Galvanic corrosion occurs when two metals/alloys having differing compositions, and thus standard electrode potentials, are electrically coupled in the presence of an electrolyte. This coupling results in the formation of a galvanic cell, which preferentially corrodes the more reactive, or electronegative, of the two metals. Since magnesium has a highly negative standard electrode potential (E 0 ¼À2.37 V) there are few metal couples with which serious and rapid corrosion does not occur. Pitting corrosion, defined by the formation of small pits on the surface of a metal/alloy, usually stem from galvanic corrosion of a surface defect and progresses similar to crevice corrosion, where stagnant liquid in a crevice begins oxidizing the metal and/or its pass...

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Influence of the heat treatment on the tribological behavior of a Ni–P–BN(h) autocatalytic composite coating

Cited by 29 publications

References 8 publications

The effect of incorporated self-lubricated BN(h) particles on the tribological properties of Ni–P/BN(h) composite coatings

The effect of incorporated self-lubricated BN(h) particles on the tribological properties of Ni–P/BN(h) composite coatings

Heat Treatment Effect of Hexagonal Boron Nitride Reinforced Electroless Nickel Coatings

Ionic Liquid Treatments for Enhanced Corrosion Resistance of Magnesium‐Based Substrates

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