Method of making ceramic/metal composites with layers of high and low metal content
AssigneeThe Washington Technology Center
InventorsIlhan A. Askay, David L. Milius, Mehrdad Yasrebi, Gyeung H. Kim, Mehmet Sarikaya
Life of this patent
Estimating the term…
Abstract
Composites of ceramic and metal exhibiting high fracture strength and toughness are formed from layers of the ceramic that have unequal concentrations and unequal porosity. The composites are made by a process that involves arranging layers of the ceramic in a predetermined pattern to provide a body that can be fully infiltrated by the metal.
Claims24
A method of making a composite of a ceramic and a metal, the method comprising the steps of:
- forming a first set of unsintered layers from a suspension of ceramic particles;
- forming a second set of unsintered layers from a suspension of ceramic particles, the volume percent of the ceramic particles in the first set of layers being unequal to the volume percent of the ceramic particles in the second set of layers;
- stacking the unsintered layers to form a body;
- converting the body to a porous body having layers with different pore volumes;
- and
- infiltrating the porous body with the metal.
A method of making a composite of a ceramic and a metal, the method comprising the steps of:
- forming a first set of unsintered layers from a suspension of ceramic particles;
- forming a second set of unsintered layers from a suspension of ceramic particles, the volume percent of the ceramic particles in the first set of layers being unequal to the volume percent of the ceramic particles in the second set of layers;
- stacking and pressing the unsintered layers to form a body, the unsintered layers of the first set and the unsintered layers of the second set arranged in a repetitive pattern;
- converting the body to a porous body;
- and
- infiltrating the porous body with the metal.
A method of making a composite of a ceramic and a metal, the method comprising the steps of:
- forming a first set of unsintered layers from a suspension of ceramic particles;
- forming a second set of unsintered layers from a suspension of ceramic particles, the volume percent of the ceramic particles in the first set of layers being unequal to the volume percent of the ceramic particles in the second set of layers;
- stacking the unsintered layers to form a body;
- sintering the body to provide a porous ceramic body having layers with different pore volumes;
- and infiltrating the porous ceramic body with the metal.
Dependencies are inferred from the claim text.