Abstract

The purpose of this investigation is to examine the effects of the strengthening treatments on the mechanical properties of the flame-sprayed titania ceramic coating layer. The strengthening treatments for flame sprayed specimens were carried out in 12 different conditions in vaccum furance. The mechanical properties such as microhardness, thermal shock resistance, adhesive strength and erosion resistance were tested for the sprayed specimens after strengthening treatments. And it was clear that the mechanical properties of coating layer were much improved by the strengthening treatments. The results obtained are summarized as follows; 1. It was shown that the metallurgical bond was formed between substrate and coating layer by the strengthening treatments and that thermal shock resistance and adhesive strength were remarkably raised. 2. Microhardness of coating lay was considerably increased by the strengthening treatments. 3. Erosion resistance and porosity of coating layer were slightly improved by the strengthening treatments.

Keywords

• Flame Spray;
• TiO$_2$ Ceramic;
• Strengthening Treatment;
• Microhardness Test;
• Thermal Shock Test;
• Adhesive Strength Test;
• Erosion Test

• 프레임 용사;
• 티타니아 세라믹;
• 강화처리;
• 미소경도시험;
• 열충격시험;
• 밀착강도시험;
• 이로우젼시험;