초록 ▼

An improved metal matrix composite utilizes boron carbide as a ceramic additive to a base material metal. The base material metal is aluminum, magnesium, or titanium, or an alloy thereof, provided in powder form with the balance of the material comprising various trace metals such as chromium, coppe

An improved metal matrix composite utilizes boron carbide as a ceramic additive to a base material metal. The base material metal is aluminum, magnesium, or titanium, or an alloy thereof, provided in powder form with the balance of the material comprising various trace metals such as chromium, copper, iron, magnesium, silicon, titanium, and zinc. The boron carbide powder comprises 10 to 30% by weight of the metal matrix composition. There is at least one other metal additive. The compositions are useful in a variety of applications where lightweight, strength, stiffness, hardness, and low density are desirable. The compositions are extrudable and weldable.

대표청구항 ▼

[ I claim:] [1.] A metal matrix composite for structural applications, comprising:a base material metal and boron carbide in a ratio of approximately between 3 and 10 to 1 by weight, the boron carbide being substantially homogeneously distributed among the metal, forming close grain boundaries there

[ I claim:] [1.] A metal matrix composite for structural applications, comprising:a base material metal and boron carbide in a ratio of approximately between 3 and 10 to 1 by weight, the boron carbide being substantially homogeneously distributed among the metal, forming close grain boundaries therewith; andless than about 3.0% by weight of at least one metal having an intermetallic phase temperature lower than the melting point of the base material metal, the at least one metal providing a chelating opportunity for the base material metal, whereinthe composite is extrudable and weldable, andthe composite undergoes yield by plastic deformation without brittle fracture.