Effect of sintering on mechanical properties of cold sprayed thermal barrier coatings

Karaoglanli A., TÜRK A., Ozdemir I.

Surface Engineering, cilt.32, sa.9, ss.686-690, 2016 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32 Sayı: 9
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1080/02670844.2016.1182959
  • Dergi Adı: Surface Engineering
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.686-690
  • Anahtar Kelimeler: Atmospheric plasma spraying, Cold gas dynamic spraying (CGDS), Oxidation, Sintering, Thermal barrier coatings
  • Manisa Celal Bayar Üniversitesi Adresli: Evet

Özet

In this study, thermal barrier coatings were deposited on nickel-based super-alloy with CoNiCrAlY bond and yttria partially stabilised zirconia top coats, using cold gas dynamic spraying and atmospheric plasma spraying techniques, respectively. High temperature oxidation behaviour and sintering effect on the mechanical properties of the coatings were studied. The main objective of this work is to explain the alteration in coating structure depending on temperature, and the mechanisms that lead to alterations in mechanical properties such as Young’s modulus and hardness. Structural examination after oxidation revealed a decrease in porosity content and crack healing on ceramic top coatings resulting from sintering effect.