| abstract |
A preparation method of a low-stress molded B 4 C/Al composite material profile, the invention relates to a preparation method of a low-stress molded B 4 C/Al composite material profile. The invention aims to solve the problem of high deformation resistance of the existing B 4 C/Al composite material profile during its thermal deformation process. Methods: 1. powder pre-oxidation; 2. powder mixing; 3. cold pressing of composite materials; 4. hot pressing and sintering of composite materials; 5. hot extrusion of composite materials. The invention has the advantages of short production cycle, simple operation, low production cost and low energy consumption; the obtained composite material profile has no brittle interface reaction product, high densification degree (>99%), high specific strength and specific stiffness, low density, and high strength and Excellent plastic matching and low deformation resistance; profiles can be used for lead screws, stringers, and missile support structures to reduce structural quality and improve material reliability. The present invention is used for B 4 C/Al composite material profiles. |