Effect of Nano Ceramic Coatings on Casting, Microstructur and Mechanical Properties of Thin Wall Aluminium Castings Mansour Borouni Mahmoud Salehi m.mahmoudsalehi@ma.iut.ac.ir Department of Materials Engineering Isfahan University of Technology, 84156-83111, Isfahan, Iran Degree: M. Sc Language: Farsi Dr. Mohammad Hosein Fathi, Prof. (Supervisor), E-mail: fathi@cc.iut.ac.ir Dr. Behzad Niroumand, Assoc. Prof.(Supervisor), E-mail: behzen@cc.iut.ac.ir Gravity casting is a popular method for production of complex thin wall castings. In gravity casting method of thin wall castings, the melt that filling the mould with effect of self weight, doesn,t have sufficient fluidity, consequently causing defects sach as cold shut, misrun and shrinkage defects during the solidification. The mentioned defects reduces quality and mechanical properties of thin wall casting parts. The use of aluminium thin wall castings in production of aluminium parts is necessary not only for reduction of the part weight but also for achievment an appropriate weight to strength ratio. Most of thin walled parts used in the aircraft manufacturing industries, are produced under dir=rtl Keywords : AL4-1 aluminium alloy; Nano ceramic coating; Micro ceramic coating; Fluidity length; Thin wall castings; Mechanical properties; Casting defects; Radiography.
