Shilabati Hembram


Designation: Research Scholar
Degree: Ph. D.
Registration No.: PhD/R/2015/0135, Date: 29 Dec 2015Supervisor: Manojit Ghosh

Academic Qualification

B. Tech. – Metallurgy and Materials Engineering

M. Tech. – Metallurgy and Materials Engineering

Research Area

Topic: Transition and rare earth metal based micro-nano sized powder coating by HVOF Technique for wear and corrosion resistance applications

In this project work, firstly the synthesis of Cu-Al-Fe-B (41: 40: 18.18: .82 (wt. %)) powder is carried out using mechanical alloying process through planetary ball milling machine. The micro-structural evolutions and phase transformations of as-milled powders are studied by means of field-emission scanning electron microscopy (FESEM) and x-ray diffractometry (XRD), while the thermal behavior is investigated by differential thermal analysis (DTA). Interestingly, it is observed that at longer ball milling time the grain size of the powder is gradually decreased while the lattice strain is increased almost 100 orders of magnitude. The stable AlCuFe single phase could be directly synthesized in short milling times by a planetary ball milling. However, the Beta Boron (B1) is found to be present in the above-mentioned powder. After the synthesis of Cu-Al-Fe-B alloy powder this project work presents the aspect of wear and surface modification of AA7075 by thermal spray coating technique (Cold spray coating). However we started the project work of surface coating with the High Velocity Oxy Fuel (HVOF) thermal spray technique but there is problem regarding the powder flow ability. For this reason, we shifted the coating process from HVOF to Cold spray coating technique.