Patent ID: 9115034
Filing Date: 2015-08-25
Classification: B23K,B28B,C04B

Abstract:
1. Method for manufacturing ceramic parts comprising implementation of a ceramic particle mixture, as components, a predominant portion by weight of sinterable particles made of a ceramic material and particles of at least one additive, at least one of said at least one additive being a solid inorganic material, wherein said inorganic solid material is absorbent for laser radiation emitting a predetermined energy flow at a predetermined wavelength, and at this wavelength has a specific absorptivity greater than that of the other components of the ceramic mixture, in that said ceramic mixture contains the particles of absorbent inorganic solid matter in the dispersed state, in proportions of less than 5% by weight and more than 0% by weight of the dry mixture, and in that the method further comprises green shaping of this ceramic mixture and obtaining a dry green ceramic blank, green machining of the green ceramic blank, by removal of ceramic material, by its exposure to said pulsed laser radiation emitting a predetermined energy flow at said predetermined wavelength, and during said exposure to this laser radiation, direct selective absorption of the laser radiation energy by the particles of absorbent dispersed inorganic solid material which degrade abruptly, with gaseous emission, local dislocation of ceramic material from the green ceramic blank, ejection of this dislocated ceramic material and obtaining a machined ceramic part in the green state.