公开(公告)号：US06399018B1

公开(公告)日：2002-06-04

申请号：US09293706

申请日：1999-04-16

申请人： Randall M. German ,  Timothy J. Weaver ,  Julian A. Thomas ,  Sundar V. Atre ,  Anthony Griffo

发明人： Randall M. German ,  Timothy J. Weaver ,  Julian A. Thomas ,  Sundar V. Atre ,  Anthony Griffo

IPC分类号： B22F700

CPC分类号： B22F3/22 ,  B22F3/26 ,  B22F2998/00 ,  C22C1/1015 ,  C22C1/1036 ,  Y10T428/12007 ,  B22F5/007 ,  B22F1/0014 ,  B22F2207/01

摘要： Solid objects are made by means of a novel multi-step forming, debinding, sintering and infiltrating process, using a metal-ceramic composition. In this process, the mixture is held for a period of time to degas and settle the powdered material from a liquid binder. The packed geometry is then heated to above the melting temperature of the binder to remove the binder portion of the solid geometry. Upon removal of the binder the binder-free solid geometry is raised to a temperature where the metal pre-sinters together into a three-dimensional rigid matrix with interconnected porosity to form a solid precursor. The porous matrix includes the particulate ceramic material and a first metal, which are at least partially sintered. A molten second metal is then introduced to the fill the porous matrix and form an infiltrated matrix. In addition to speed of production, improvements associated with this method include a solid object having improved thermal conductivity, hardness, wear resistance and reduced shrinkage as compared with the rapid tooling techniques taught in the prior art.

摘要翻译： 通过使用金属 - 陶瓷组合物的新型多步骤成形，脱脂，烧结和渗透方法制备固体物体。 在该方法中，将混合物保持一段时间以从液体粘合剂中脱气并沉淀粉末状材料。 然后将包装的几何形状加热到粘合剂的熔融温度以上以除去固体几何形状的粘合剂部分。 在去除粘合剂后，将不含粘合剂的固体几何形状升高到金属预先烧结成具有相互连接的多孔性的三维刚性基质以形成固体前体的温度。 多孔基体包括颗粒陶瓷材料和至少部分烧结的第一金属。 然后将熔融的第二金属引入填充多孔基质并形成渗透的基质。 除了生产速度之外，与现有技术中教导的快速加工技术相比，与该方法相关的改进包括具有改善的导热性，硬度，耐磨性和减小的收缩率的固体物体。