| 摘要 |
PURPOSE:To make a catalytic component firm and to support the component in large quantities, by forming an intermediate layer having a good adhesiveness to the surface of a heat resistant metal base material and forming a ceramic coating layer on the surface of the intermediate layer by plasma spraying so as to incline the same by 45-70 deg. from the normal line of the surface of the base material. CONSTITUTION:For example, a stainless steel plate having a thickness of 0.3mm is used as a base material and, after No. 60 baked alumina is applied to both surfaces of the base material 1 under pressure to perform blasting treatment, a self-bonding spraying powder consisting of 80 Ni - 20 Al having 100-250 mesh is applied to the base material 1 to form an intermediate layer 3 having a thickness of 50mum. This intermediate layer has surface unevenness of 30-40mum, and a large number of internal voids are also present in the layer 3. Subsequently, an alumina powder of 100-250 mesh is applied to the intermediate layer 3 using a plasma spraying gun 2 to form a ceramic layer 4 composed of alumina. In this case, plasma spraying is performed so that the spraying gun 2 is inclined by an angle theta of 45-70 deg. from the normal line of the base material 1. |
