Morphology and Hardness of Electrochemically-Codeposited Ti-Dispersed Ni-Matrix Composite Coatings

• Autorzy: Srikomol S. , Janetaisong P. , Boonyongmaneerat Y. , Techapiesancharoenkij R.

Identyfikatory

DOI

10.2478/amm-2014-0220

Warianty tytułu

PL

Morfologia i twardość elektrochemicznie współosadzonych powłok kompozytowych Ni-Ti

• Języki publikacji: EN

Abstrakty

EN

The effects of current density and Ti particle loading in a plating bath on the morphology and hardness of Ni-Ti composite coatings via an electrochemical-codeposition process were investigated. The Ti-reinforced Ni-matrix composite coatings were codeposited on copper substrates using a Ni-ion electrolytic solution stably suspended with -45 micron Ti particles. Within the current studied range, the coatings’ Ti contents are in the range between 46 and 62 at.%. The morphology appeared to vary with current density. Structures of the Ni-Ti composite coatings produced under low current density conditions revealed denser structures, which is in contrast to the more porous structures noted in the coatings produced under high current density. An initial increase of current density from 100 to 150 mA/cm2 also tends to raise Ti coating content. The reinforcement of Ti particles in the coatings also increased their hardness, which is attributed to the possible role of the embedded Ti particles in hindering matrix deformation. The effect of Ti loading on the coating’s Ti contents was not significant under conditions used in the present study.

PL

Badano wpływ gęstości prądu i zawartości cząstek Ti w kąpieli galwanicznej na morfologię i twardość elektrochemicznie współosadzanych powłok kompozytowych Ni-Ti. Kompozytowe powłoki niklowe zbrojone cząstkami Ti zostały współosadzone na powierzchniach miedzianych z kąpieli elektrolitycznej zawierającej jony Ni i 45 mikronowe cząstki Ti tworzące stabilną zawiesinę. Zawartość Ti wbudowanego w powłoki wahała się w granicach 46-62 at.%. Morfologia powłok zmienia sie wraz ze zmianą stosowanej gęstości prądu. W przypadku kompozytowych powłok Ni-Ti wytwarzanych przy niskich gęstościach prądu stwierdzono bardziej zwarte struktury, w przeciwienstwie do bardziej porowatych struktur stwierdzonych w przypadku powłok wytwarzanych przy wysokich gęstościach prądu. Początkowy wzrost gęstości prądu od 100 do 150 mA/cm² równiez powoduje podniesienie zawartości Ti w powłokach. Ze wzrostem zawartości Ti wzrasta również twardość powłoki, co można przypisać roli osadzonych cząstek Ti utrudniających odkształcenie osnowy. W warunkach stosowanych w tej pracy wpływ zawartości Ti w kąpieli na zawartość Ti w powłokach nie był znaczący.

Słowa kluczowe

EN

electrochemical codeposition; composite coatings; Nickel-Titanium; morphology; hardness

PL

współosadzanie elektrochemiczne; powłoki kompozytowe; powłoki Ni-Ti; morfologia; twardość

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2014
• Tom: Vol. 59, iss. 4
• Strony: 1287--1292
• Opis fizyczny: Bibliogr. 27 poz., rys., tab.

Twórcy

autor

Srikomol S.

• Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok, 10900, Thailand

autor

Janetaisong P.

• Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok, 10900, Thailand

autor

Boonyongmaneerat Y.

• Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok, 10330, Thailand

autor

Techapiesancharoenkij R.

• Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok, 10900, Thailand

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