Ni-B Alaşım Kaplamaların Kristal Yapı ve Sertlik Özelliklerine Akım Yoğunluğunun Etkisi

Yıl 2022, Cilt: 37 Sayı: 2, 439 - 448, 30.06.2022

Ersin Ünal Abdülkadir Yaşar İsmail Hakkı Karahan

https://doi.org/10.21605/cukurovaumfd.1146395

Öz

Ni-B alaşım kaplamalar yüksek sertlik, yüksek aşınma direnci ve iyi korozyon direnci gibi üstün özellikleri sayesinde birçok endüstri dalında başarılı bir şekilde uygulanabilmektedir. Bu çalışmada, Ni-B alaşım kaplamalar geleneksel elektrokimyasal kaplama metoduyla paslanmaz çelik altlık üzerine farklı akım yoğunluğu değerlerinde depolanmıştır. Elektrokimyasal depolama işleminde Watts tipi geleneksel nikel banyosu kullanılmıştır. Nikel ana yapısına alaşım malzemesi olarak ilave edilen bor elementi kaynağı olması amacıyla elektrolite trimetilamin boran kompleksi (TMAB) ilave edilmiştir. Üretilen numunelerin kristal yapı, mikrosertlik ve morfoloji özellikleri incelenmiştir. Akım yoğunluğu azalması Ni-B kristal yapısının tane büyüklüğünde azalmaya neden olmuş ve yapının amorfa doğru kaymasına neden olmuştur. Ayrıca, akım yoğunluğu azalması neticesinde Ni-B kaplamanın mikrosertlik değerinde de artış olduğu tespit edilmiştir. Bunun yanında Ni-B alaşım kaplamaların farklı akım yoğunluğu değerlerinde depolanması neticesinde yüzey morfolojisinin de etkilendiği ve numunelerin farklı görünüme sahip olduğu anlaşılmıştır.

Anahtar Kelimeler

Elektrodepolama, Akım yoğunluğu, Mikrosertlik, Kristal yapı, Ni-B alaşım kaplama

The Effect of Current Density on the Crystal Structure and Hardness Properties of Electrochemically Deposited Ni-B Alloy Coatings

Öz

Ni-B alloy coatings can be successfully applied in many industries thanks to their superior properties such as high hardness, high wear resistance and good corrosion resistance. In this study, Ni-B alloy coatings were deposited on a stainless steel substrate at different current density values by conventional electrochemical coating method. A traditional Watts type nickel bath was used in the electrochemical deposition process. Trimethylamine borane complex (TMAB) was added to the electrolyte in order to be a source of boron element added to the nickel main structure as an alloying material. The crystal structure, microhardness and morphology properties of the produced samples were investigated. The decrease in current density caused a decrease in the grain size of the Ni-B crystal structure and caused the structure to shift towards amorphous. In addition, it was determined that the microhardness value of the Ni-B coating increased as a result of the decrease in current density. In addition, as a result of the Ni-B alloy coatings being deposited at different current density values, it was understood that the surface morphology was also affected and the samples had different appearances.

Anahtar Kelimeler

Electrodeposition, Current density, Microhardness, Crystal structure, Ni-B alloy coating

Kaynakça

• 1. Ogihara, H., Udagawa, K., Saji, T., 2011. Effect of Boron Content and Crystalline Structure on Hardness in Electrodeposited Ni-B Alloy Films. Surface&Coatings Technology, 206, 2933-2940.
• 2. Zhang, Y., Zhang, S., He, Y., Li, H., He, T., Fan, T., Zhang, H., 2021. Mechanical Properties and Corrosion Resistance of Pulse Electrodeposited Ni-B/B4C Composite Coatings. Surface and Coatings Technology, 421, 127458.
• 3. Bekish, Y.N., Poznyak, S.K., Tsybulskaya, L.S., Gaevskaya, T.V., 2009. Electrodeposited Ni-B Alloy Coatings; Structure, Corrosion Resistance and Mechanical Properties. Electrochimica Acta, 55, 2223-2231.
• 4. López, J.R., Méndez, P.F., Pérez-Bueno, J.J., Trejo, G., Stremsdoerfer, G., Meas, Y., 2016. The Effect of Boron Content, Crystal Structure, Crystal Size on the Hardness and the Corrosion Resistance of Electrodeposited Ni-B Coatings. International Journal of Electrochemical Science, 11, 4231-4244.
• 5. Matsui, I., Omura, N., Yamamoto, T., Takigawa, Y., 2018. Electrodeposition with Intermittent Addition of Trimethylamine Borane to Produce Ductile Bulk Nanocrystalline Ni-B Alloys. Surface & Coatings Technology, 337, 411-417.
• 6. Fang, X., Jin, G., Cui, X.F., Liu, J.N., 2016. Evolution Characteristics of Residual Stress in Metastable Ni-B Alloy Coatings Identified by Nanoindentation. Surface & Coatings Technology, 305, 208-214.
• 7. Sheu, H.H., Tzeng, Y.C., Syu, J.H., 2019. Study of the Strengthening Mechanism of Electrodeposited Ni-B Thin Films with Ultra-low Boron Content. Materials Letters, 238, 275-277.
• 8. Boukhoubza, I., Khenfouch, M., Achehboune, M., Mothudi, B.M., Zorkani, I., Jorio, A., 2019. X-ray Diffraction Investigations of Nanostructured ZnO Coated with Reduced Graphene Oxide. Journal of Physics, 1292, 012011.
• 9. Bindu, P., Thomas, S., 2014. Estimation of Lattice Strain in ZnO Nanoparticles: X-Ray Peak Profile Analysis. Journal of Theoretical and Applied Physics, 8, 123-134.
• 10. Saleem, M., Fang, L., Ruan, H.B., Wu, F., Huang, Q.L., Xu, C.L., Kong, C.Y., 2012. Effect of Zinc Acetate Concentration on the Structural and Optical Properties of ZnO Thin Films Deposited by Sol-Gel Method. International Journal of Physical Sciences, 7(23), 2971-2979.
• 11. Bilgin, V., Köse, S., Atay, F., Akyüz, I., 2005. The Effect of Substrate Temperature on the Structural and Some Physical Properties of Ultrasonically Sprayed CdS Films. Materials Chemistry and Physics, 94, 103-108.
• 12. Khan, Z.R., Zulfequar, M., Khan, M.S., 2010. Optical and Structural Properties of Thermally Evaporated Cadmium Sulphide Thin Films on Silicon (100) Wafers. Materials Science and Engineering B, 174, 145-149.
• 13. Williamson, G.B., Smallman R.C., 1956. Dislocation Densities in Some Annealed and Cold-Worked Metals From Measurements on the X-ray Debye-Scherrer Spectrum. Philosophical Magazine A, 8(1), 34-46.
• 14. Patterson, A.L., 1939. The Scherrer Formula for X-ray Particle Size Determination. Physical Rewiev, 56, 978-982.
• 15. Usta, M., Karahan, İ.H., 2022. Effect of Current Density on Structural and Radiation Shielding Characteristics of NiCoB/hBN Composites. Radiation Physics and Chemistry, 194, 110027.
• 16. Krishnaveni, K., Narayanan, T.S.N.S., Seshadri, S.K., 2008, Electrodeposited Ni–B–Si3N4 Composite Coating: Preparation and Evaluation of Its Characteristic Properties. Journal of Alloys and Compounds, 466, 412-420.
• 17. Zhang, D., Cui, X., Jin, G., Cai, Z., Dong, M., 2018. Thermal Stability of Ni-B/La2O3 Coatings by Electro-Brush Plating Technique. Surface & Coatings Technology, 349, 1042-1047.