PURPOSE:To improve product yield and to provide prolonged heat resistance and thermal shock resistance by blending 2MgO.SiO2 and MgO.4ZrO2 in a specific ratio. CONSTITUTION:A thermal spraying material is composed of a 2MgO.SiO2- MgO.4ZrO2 oxide and has a composition which consists of, by weight, 20-50% 2MgO.SiO2 and 50-80% MgO.4ZrO2 and in which 2MgO.SiO2+MgO.4ZrO2=100 is satisfied. A heat resisting member is formed by thermally spraying the above coating material on a heat resisting metallic material or parts having metallic coating layer excellent in high temp. corrosion resistance. The grain size of the oxide as coating material is regulated to 5-500mum, and particularly, it is preferable to regulate average grain size to 10-100mum. This thermal spraying material has superior mechanical strength. By using this thermally sprayed layer, a turbine blade, etc., having excellent thermal shield effect and heat resistance can be obtained.
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