Effect of nickel content on the boronising behaviour of permalloys

UÇAR N., Iyi O., ÇALIK A., Karakas M.

Oxidation Communications, cilt.38, sa.2, ss.748-755, 2015 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 38 Sayı: 2
  • Basım Tarihi: 2015
  • Dergi Adı: Oxidation Communications
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.748-755
  • Anahtar Kelimeler: Boride layer, Boronising, Borosilicide phase, Hardness, Permalloys
  • Isparta Uygulamalı Bilimler Üniversitesi Adresli: Hayır

Özet

Permalloys with nickel contents ranging from 60 to 90% were boronised in a solid medium using the powder pack method. In this method, commercial Ekabor-II powders were thoroughly mixed with ferro-silicon powders to form the boronising medium. The samples were boronised in an electrical resistance furnace for 5 h at 1173 K under atmospheric pressure. The results showed that borosilicide and boride layers were formed on the surface of boronised permalloys, with average hardness of 900–1000 HV0.1. The average thickness of the multilayer coating was 90 mm, and did not show significant change with Ni content within the range studied. The saw-tooth morphology of the boride layers were smoothened with increasing nickel content.