| 摘要 |
PURPOSE:To prevent generation of crack in depression part at and after casting by applying a solution containing specific metal oxide to position requiring high strength in ceramic material and treating of diffusion. CONSTITUTION:A ceramic raw material made of alumina titanate having 0.1-10mum diameter is shaped to manifold-type liner 9 forming manifold-type air suction port and/or manifold-type exhausting port 7 of cylinder head for engine. Then, a solution containing 0.05-5wt.% at least one metal oxide selected from SiO2, ZrO2, MgO, Fe2O3 and SnO2 is applied on inner wall part a1 in depression part 131 in the manifold-type liner 9 and performed of diffusion treatment in atmosphere at 1300-1600 deg.C for 1-5 hour. |
