Effect of a multilayer structure and lubrication on the tribological properties of coatings of Fe-W alloys

Цынцару, Н.; Bobanova, Zh. I.; Kroitoru, D. M.; Чебан, В. Ф.; Poshtaru, G. I.; Дикусар, А. И.

doi:10.3103/s1068375510060025

Cited by 14 publications

(10 citation statements)

References 19 publications

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“…15 Nevertheless, in order to reduce the environmental impact of electrochemical bath containing ammonia salts, attempts to find ammonia-free baths were explored. 1,[16][17][18][19] An example of successful elaboration of ammonia-free baths was demonstrated for Ni alloys electrodeposition, 20,21 where electrolytes based on glycolic acid were used, but there are no similar data reported for Fe-W alloys deposition.…”

mentioning

confidence: 99%

Fe (III)-Based Ammonia-Free Bath for Electrodeposition of Fe-W Alloys

Nicolenco

Цынцару

Cesiulis

2017

J. Electrochem. Soc.

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Electrodeposited Fe-W alloys are the subject of extensive studies to be applied in versatile engineering applications, and many solutions based on Fe(II) complexes are described for their deposition. However, in aqueous solutions containing dissolved oxygen, Fe(II) compounds are unstable thermodynamically and tend to oxidize to Fe(III) state that decreases the sustainability of the baths. The aim of the present study was to develop an environment-friendly and thermodynamically stable Fe(III)-based electrolyte for electrodeposition of Fe-W alloys with tunable composition. It was found that: (i) concurrent use of two complexing agents as citric and glycolic acids stabilizes Fe(III)-based bath in neutral and weak alkaline medium (no precipitates are formed); (ii) the current efficiency of the process can reach up to 60-70%, which has never been reported before for Fe-W alloys electrodeposition; (iii) nanocrystalline Fe-W coatings containing 11-24 at.% of W can be obtained from Fe(III)-based glycolate-citrate bath at temperature range 20-65 • C. The increase in tungsten content in the alloy resulted in decreased grain size up to < 5 nm; (iv) smooth, free of cracks and having deposition rates up to 0.18 μm/cm 1 alloys are successfully electrodeposited at elevated temperatures from elaborated glycolate-citrate electrolyte.

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mentioning

confidence: 99%

Fe (III)-Based Ammonia-Free Bath for Electrodeposition of Fe-W Alloys

Nicolenco

Цынцару

Cesiulis

2017

J. Electrochem. Soc.

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“…Meanwhile for Fe-W alloy the critical grain size of about 4 nm was determined, while the hardness reaches the maximum value of 1020 HV 980 when tungsten content in Fe-W deposit increases up to 26 at.% [21]. Overall, Fe-W alloy coatings are characterized by higher hardness than that of Co-W deposits in the range of normal loads of 2-100 mN [18]. The maximum hardness values for Ni-W deposits usually are lower (in the range of 734±70 HV 10 ) than for Co-W and Fe-W alloys [12,14,22,23].…”

Section: Tribological Propertiesmentioning

confidence: 96%

“…Co-W and Fe-W alloy coatings were obtained by electrodeposition under galvanostatic mode from a citrate electrolyte, which was described in our previous publications [16][17][18][19]. The pH was adjusted to 5.0, 6.7 or 8.0 by the addition of concentrated H 2 SO 4 or NaOH.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Corrosion and Tribological Behavior of Electrodeposited Tungsten Alloys

Vernickaite

Cesiulis

Цынцару

2017

Proccedings of International Scientific Conference "BALTTRIB 2017"

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Tungsten alloy coatings with iron group metals (Ni, Fe, Co) are considered as advanced materials for various surface engineering applications. Such coatings should be resistant to mechanical and corrosive damage, and to have improved functionality and durability. Accordingly, the objectives of this review consist in a comparative study of available literature on corrosive and wear behavior of electrodeposited tungsten alloys with iron group metals, including our recent results on evaluation of electrodeposited Co-W coatings. The wear and corrosion resistance of Ni-W, Fe-W and Co-W strongly depends on the chosen deposition conditions and subsequently on tungsten content and structure of obtained protective coatings.

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“…В работах [3][4][5] представлены результаты исследова-ний процессов сплавообразования металлов подгруппы железа с тугоплавкими металлами из сульфатно-цитрат-ных электролитов, рН 7,4-7,8, температура -53-90 °С. Формирование покрытий проводили в гальваностати-ческом режиме при варьировании плотности тока от 3 до 10 А/дм 2 .…”

Section: исследование существующих решений проблемыunclassified

“…10) и температурном воздействии. Кроме того, для всех режимов формирования поверх-ностных структур микротвердость тернарных сплавов превосходит бинарные благодаря присутствию воль-фрама в составе покрытия [5,28].…”

Section: Issn 2226-3780unclassified

A study of formation peculiarities and properties of iron coatings with refractory metals on gray cast iron SCH18

Каракуркчи

2017

TAPR

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Effect of a multilayer structure and lubrication on the tribological properties of coatings of Fe-W alloys

Cited by 14 publications

References 19 publications

Fe (III)-Based Ammonia-Free Bath for Electrodeposition of Fe-W Alloys

Fe (III)-Based Ammonia-Free Bath for Electrodeposition of Fe-W Alloys

Evaluation of Corrosion and Tribological Behavior of Electrodeposited Tungsten Alloys

A study of formation peculiarities and properties of iron coatings with refractory metals on gray cast iron SCH18

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