Akımsız Kaplama Yöntemi ile CeO2 Takviyeli Ni-B Nanokompozit Kaplama Üretimi ve Karakterizasyonu

Year 2021, Volume: 21 Issue: 1, 209 - 216, 24.02.2021

Deniz Gültekin

https://doi.org/10.35414/akufemubid.820183

Abstract

Ni-B ve Ni-B-CeO2 nanokompozit kaplamalar nikel sülfat hekzahidrat, dimetilamin boran, sodyum asetat ve tiyoüre içeren kaplama banyosu kullanılarak akımsız kaplama işlemi ile üretilmiştir. Nanokompozit üretiminde kullanılan CeO2 nanopartikül takviyelerinin boyutu 100-500 nm aralığındadır. Takviye partiküllerinin banyo içerisinde kolay dağılımını ve ıslanabilirliğini artırmak için sodyum dodesil sülfat kullanılmıştır. Takviye partikül miktarı 15 gr/lt olarak seçilmiştir. Saf Ni-B ve nanokompozit Ni-B-CeO2 akımsız kaplamalar için banyo pH değeri 6, kaplama süresi 60 dakika ve banyo sıcaklığı 70 °C ± 5 °C olarak belirlenmiştir. Takviye CeO2 nanopartiküllerinin kaplamanın morfolojisi ve sertliği üzerindeki etkileri incelenmiştir. Yapılan karakterizasyon işlemleri sonucunda nanoboyutlu CeO2 partiküllerinin Ni-B alaşımına başarılı bir şekilde ilave edildiği ve nanokompozit kaplama üretiminin gerçekleştirildiği belirlenmiştir. Bununla birlikte takviye malzemenin etkisinin karşılaştırmalı olarak incelenmesi amacıyla aynı banyo bileşimi kullanılarak takviyesiz saf Ni-B kaplama da üretilmiştir. CeO2 nanopartiküllerinin Ni-B matrisine ilave edilmesiyle hesaplanan Ni kristal boyutu 43 nm'den 24,9 nm'ye düşmüştür. Ayrıca saf Ni-B alaşımı ile kıyaslandığında CeO2 takviyeli Ni-B nanokompozit kaplamanın sertlik değerinde de artış meydana geldiği belirlenmiştir.

Keywords

Akımsız kaplama, Nanokompozit, Ni-B, CeO2

Supporting Institution

BOREN

Project Number

2017-31-07-25-001

CeO2 Reinforced Ni-B Nanocomposite Coating Production and Characterization by Electroless Coating Method

Abstract

Ni-B and Ni-B-CeO2 nanocomposite coatings were produced by electroless coating process using a coating bath containing nickel sulphate hexahydrate, dimethylamine borane, sodium acetate and thiourea. The size of the CeO2 nanoparticle reinforcements used in nanocomposite production is in the range of 100-500 nm. Sodium dodecyl sulfate was used to increase the easy dispersion and wettability of the reinforcement particles in the bath. The amount of reinforcement particles is determined as 15 g/lt. For pure Ni-B and nanocomposite Ni-B-CeO2 electroless coatings, bath pH value was 6, coating time was 60 minutes and bath temperature was 70 °C ± 5 °C. The effects of CeO2 particles used as reinforcement on the morphology and hardness of coating were investigated. Nano-sized CeO2 particles were successfully incorporated into the Ni-B alloy and nanocomposite coating was produced. Also, Ni-B coating without reinforcement was produced using the same bath composition in order to compare the effect of the reinforcement material. Due to the incorporation of CeO2 nanoparticles in the Ni-B matrix, the calculated Ni crystal size decreased from 43 nm to 24.91 nm. In addition, it was determined that the hardness of the CeO2 reinforced Ni-B nanocomposite coating increased when compared to the pure Ni-B alloy.

Keywords

Electroless coating, Nanocomposite, Ni-B, CeO2

Project Number

2017-31-07-25-001

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