Controlling sintering contraction and sintering deformation in components comprises providing the components with an insert in recesses and/or passages before sintering, sintering, and releasing the insert

摘要

Controlling the sintering contraction and sintering deformation in components made from sintered materials comprises providing the components with an insert in the region of recesses and/or passages before sintering; sintering under the usual conditions; and releasing the insert. The sintered materials and the material of the insert are selected so that a contraction is produced which makes up 99.5-50 % of the maximum linear sintering contraction of the sintered material. Preferred Features: The contraction is limited to 99-55, preferably 99-60 % of the maximum contraction. A material is used for the insert which has a heat expansion coefficient equal to or larger than the heat expansion coefficient of the sintered material in the non-sintered state. The sintered material is a metallic material and the insert is a ceramic material.