Three-dimensional shaped article production method

Abstract

A three-dimensional shaped article production method for producing a three-dimensional shaped article by stacking layers to form a stacked body includes a constituent layer formation step of forming a constituent layer which corresponds to a constituent region of the three-dimensional shaped article, a support layer formation step of forming a support layer which is in contact with the constituent layer and supports the constituent layer, and a sintering step of sintering the constituent layer, wherein the support layer is configured such that as compared with the volume decrement accompanying the sintering step of a space surrounded by the constituent layer from at least two directions, the volume decrement accompanying the sintering step of the support layer which supports the constituent layer in the space is larger.

What is claimed is: 
     
         1 . A three-dimensional shaped article production method for producing a three-dimensional shaped article by stacking layers to form a stacked body, comprising:
 a constituent layer formation step of forming a constituent layer which corresponds to a constituent region of the three-dimensional shaped article;   a support layer formation step of forming a support layer which is in contact with the constituent layer and supports the constituent layer; and   a sintering step of sintering the constituent layer, wherein   the support layer is configured such that as compared with the volume decrement accompanying the sintering step of a space surrounded by the constituent layer from at least two directions, the volume decrement accompanying the sintering step of the support layer which supports the constituent layer in the space is larger.   
     
     
         2 . The three-dimensional shaped article production method according to  claim 1 , wherein at least a portion of the support layer which supports the constituent layer in the space is structurally changed accompanying the sintering step. 
     
     
         3 . The three-dimensional shaped article production method according to  claim 1 , wherein the support layer is configured such that at least a portion which supports the constituent layer in the space includes a region whose volume change accompanying the sintering step is relatively large and a region whose volume change accompanying the sintering step is relatively small. 
     
     
         4 . The three-dimensional shaped article production method according to  claim 1 , wherein at least a portion of the support layer which supports the constituent layer in the space is powdered accompanying the sintering step. 
     
     
         5 . The three-dimensional shaped article production method according to  claim 1 , wherein at least a portion of the support layer which supports the constituent layer in the space is volatilized accompanying the sintering step.