Method for producing engine components with a geometrically complex structure

A method for manufacturing a thermally stressed engine component having a geometrically complex structure,comprising:

• metal injection molding a first green compact section with a first mixture of metal powder and binder;
• metal injection molding a second green compact section with a second mixture of metal powder and binder;
• debindering the first green compact section and the second green compact section to form a first brown compact section and a second brown compact section, respectively;
• providing that the first brown compact section includes a first joining surface with a connecting projection and the second brown compact section includes a second joining surface with a connecting recess;
• assembling the first brown compact section and the second brown compact section together such that the first joining surface is adjacent the second joining surface and the connecting projection is engaging the connecting recess to form a multi-part brown compact;
• providing that the first brown compact section has greater shrinkage during sintering than the second brown compact section by providing that the first mixture of metal powder and binder is different from the second mixture of metal powder and binder;
• sintering the multi-part brown compact such that the first brown compact section and the second brown compact section are automatically drawn together to press against each other due to the different shrinkages.