Carbide Dispersion Strengthened Copper Matrix Composites Research

Two methods of materials preparation-Self-propagating Synthesis and Mechanical Alloying were applied broadly in field of material. The technical of Reactive Ball Milling was invented when phenomenon of self-propagating was disclosed in mechanical alloying. High-intensity Cu-based composite materials were fabricated by Reactive Ball Milling and Mechanical Alloying.TiC,ZrC and Cu-50%TiC were fabricated by Reactive Ball Milling using Ti,Zr,C and Cu powders for raw materials. Compound powders were prepared by ball-milling with raw powders that have been fabricated. Dispersion strengthen Cu-based materials was synthesized at last though a set of technical course that consist of different pressing technique ,sintering technique and heat extrusion technique. The mechanism of synthesizing TiC and Cu-50%TiC was SHS Reactive Ball Milling. The mechanism of synthesizing ZrC was Reactive Ball Milling that gave out heat indistinctly. Physics capability such as density, conduct and mechanics capability such as tensile strength, hardness and stretch ratio were tested during technical course. Photograph analysis and EMPA analysis were carried out. The influence factor on materials physics and mechanics capability were investigated, which induced by powders synthesis technique, pressure and sinter temperature. The relation among density, hardness, conduct, tensile strength and stretch ratio was researched. The study indicated that intensity of materials was enhanced because TiC and ZrC diffused in Cu matrix, and counterworked the motion of dislocation. The Cu-based composite materials that prepared in situ synthesis have more fine capability. The upper density was gained when pressing pressure was increasing, and sintering temperature was 800. Subsequently, the capabilities of materials were heighten when density was improved. When materials relative density reached 93.35%, their conduct could reach 58.62%IACS, their hardness could reach HB135. Materials relative density could reach 97.45% when materials were extruded thermally. Consequently, their tensile strength could reach 521.70MPa. Materials displayed synthetically capability well in our studying field.