A Novel Self-Repaired Iron Based High Temperature Coating Alloy

Volume 13 Issue 2 November - January 2018

Research Paper

A Novel Self-Repaired Iron Based High Temperature Coating Alloy

Elguja R. Kutelia*, Sayavur Bakhtiyarov**, Mikheil N. Okrosashvili***, Olga O. Tsurtsumia****, Akshin S. Bakhtiyarov*****, Besik G. Eristavi******

* Professor, Department of Engineering Physics, Georgian Technical University, Tbilisi, Georgia.

** Professor, New Mexico Institute of Mining and Technology, USA.

*** Chair, Metal Process Engineering and Material Science Laboratory, Georgian Technical University, Tbilisi, Georgia.

****,****** Senior Scientific Researcher, Republic Center for Structure Research of Georgian Technical University, Tbilisi, Georgia

***** IT Specialist, US Social Security Administration, USA.

Kutelia, E. R. , Bakhtiyarov , S. I. , Okrosashvili, M. N. , Tsurtsumia, O.O., Bakhtiyarov , A. S., and Eristavi, B. G. (2018). A Novel Self-Repaired Iron Based High Temperature Coating Alloy. i-manager’s Journal on Future Engineering and Technology, 13(2), 1-16. https://doi.org/10.26634/jfet.13.2.13867

Abstract

Self-healing capability of newly developed Fe45Cr4Al1Ni03La refractory alloy has been investigated in this study. During the tests as substrates, the authors used both monocrystals (Nb and Mo) and polycrystalline (low alloyed Cr) samples. The selected substrates were coated with Fe45Cr4Al1Ni03La refractory alloy using the electron-beam vacuum evaporation o technique followed by high temperature (1200 C) treatment. The structural properties of the Fe45Cr4Al1Ni03La composition was studied using various techniques, such as SEM, WDS, AES, and LM. The results of the experimental studies demonstrated that the Fe45Cr4Al1Ni03La coating layer on the selected substrate surfaces at high temperatures has an ability to heal the micro cracks created as a result of mechanical and thermal damages. It is shown that the Fe45Cr4Al1Ni03La coating composite exhibits high adhesion with all selected substrates, and consequently, a high protective capability against both corrosion and wear at high temperatures. The newly developed Fe45Cr4Al1Ni03La composition is considered as a breakthrough engineered material for commercial applications at high temperatures.