50Fe-50Co alaþýmýnýn borlanmasý ve karakterizasyonu

Bu çalýþmada, vakum/argon altýnda hazýrlanan atomik olarak eþit miktarda Fe ve Co içeren 50Fe-50Co ikili alaþýmý kutu borlama yöntemi ile 800 °C, 900 °C ve 1000 °C’de 6 saat süre ile kaplanmýþtýr. Oluþturulan kaplamanýn mikroyapýsý, faz bileþimi, sertliði, kaplamanýn kimyasal bileþimi, X-ray kýrýnýmý, optik mikroskop, taramalý elektron mikroskobu, mikrosertlik cihazlarýyla karakterize edilmiþtir. Her üç sýcaklýkta da kaplama tabakasýnýn altlýk malzemeye çok mükemmel yapýþtýðý ve testere diþi morfolojisine sahip borür tabakanýn oluþtuðu tespit edilmiþtir. Kaplama Fe2B ve Co2B fazlarýndan oluþmuþtur. Kobalt elementinin kaplama içerisinde homojen þekilde daðýlmýþ olduðu tespit edilmiþ. Kaplama kalýnlýðý sýcaklýða baðlý olarak artmýþtýr. Yoðun borür tabakanýn sertliði kaplama kalýnlýðý boyunca deðiþmemiþtir.

Boronizing of 50Fe-50Co alloy and its characterization

In this study, equiatomic Fe and Co binary alloy was prepared under argon/vacuum atmosphere. 50Fe-50Co alloy was coated with pack boronizing method for the duration of 6 h at 800 °C, 900 °C and 1000 °C. XRD, OM, SEM, SEM-EDS, Vickers hardness measurement devices were applied to characterize, hardness, microstructure, chemical and phase constituents of the synthetized boride layer on Fe-Co alloy. Perfect adhesion of coating to substrate and formation of saw tooth shaped boride layer on the substrate were observed. The coating was composed of Fe2B and Co2B phases. The existence and homogenous distribution of Co in the coating was determined. The coating thickness increased with boriding process temperature. The coating hardness did not vary significantly throughout the thickness of the main boride layer.