Abstract
Abstract Titanium alloys based on the γ -TiAl intermetallic phase are a type of material which may replace nickel supperalloys in high temperature applications. Not enough resistance to corrosion at temperatures above 900°C remains the biggest limitation in industrial practices. The paper presents results of preliminary research into application of new type heat resistant coatings on the basis of γ -TiAl alloy. MeCrAlY and Si coatings were formed by pack cementation method. Aluminide coatings were deposited by pack cementation method and VPA. Research results have shown that except for the coating formed by VPA, coatings were characterized by high porosity and therefore would not ensure appropriate protection against oxidation. Further research will be necessary into application of the VPA method in protecting γ-TiAl titanium alloys in order to improve their heat resistance.
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