Metal matrix composites reinforced with diamond particles

Abstract

Materials surface modification aims for the development of new material’s surfaces throughdifferent methods to improve their structure, phase composition, tribological, physical andmechanical characteristics in addition to their chemical composition. Future of glass industrypasses through solving the plunger surfaces modification to reduce friction and wear duringblowing or pressing stage of production. This thesis aims to study the modification of plungersurfaces through the design of metal matrix composite material located on the surface of Cu-BeCo substrate, reinforced with diamond particles, which surfaces will be functionalized with a lowmelting alloy to improve the adherence of diamonds. Metal matrix from Cu-Be-Co substrate’sreinforced by of diamond particles with a low melting alloy of copper-tin-titanium.Mechanical alloying through Ball milling technique has been simultaneously used to designthe low melting Cu-Sn-Ti alloy and diamonds surface functionalization. The 4.81 gr of powderparticles ( 10 % of diamonds, and the remain composition from 75% wt of Copper 15% wt of Ti,10% of tin and 1-3% of stearic acid) have been mixed and alloyed into an 80 ml vessel. Thesubstrate Cu-Be-Co surface’s texturized by laser to produce a pattern on the surface as a matrix,then functionalized diamond particles will be introduced into the matrix by cold isostatic press andsintering. For interpretation of the result, the main experimental procedures have beeninvestigated to characterize the properties of substrate (Cu-Be-Co), functionalized diamondparticles (diamond + Cu-Sn-Ti +stearic acid) and the metal matrix’s composites reinforced bydiamond particles. Hardness testing, X-Ray Diffraction (XRD), Scanning Electron Microscopy(SEM), Energy Dispersive X-Ray Spectroscopy (EDS), and tribological testing Pin-on-desk testsperformed as characterization techniques.Despite the presence of a variety of oxides, the reinforced material exhibited better tribologicalperformance than the unreinforced Cu-Be-Co when tested on a pin-on-disk. As a consequence,significantly reduces of wear resistance and coefficient of friction attained, up to 12 times lowerwear rate and 11% reduce of COF respectively.

Materials surface modification aims for the development of new material’s surfaces through different methods to improve their structure, phase composition, tribological, physical andmechanical characteristics in addition to their chemical composition. Future of glass industrypasses through solving the plunger surfaces modification to reduce friction and wear duringblowing or pressing stage of production. This thesis aims to study the modification of plunger surfaces through the design of metal matrix composite material located on the surface of Cu-BeCo substrate, reinforced with diamond particles, which surfaces will be functionalized with a lowmelting alloy to improve the adherence of diamonds. Metal matrix from Cu-Be-Co substrate’sreinforced by of diamond particles with a low melting alloy of copper-tin-titanium. Mechanical alloying through Ball milling technique has been simultaneously used to designthe low melting Cu-Sn-Ti alloy and diamonds surface functionalization. The 4.81 gr of powderparticles ( 10 % of diamonds, and the remain composition from 75% wt of Copper 15% wt of Ti,10% of tin and 1-3% of stearic acid) have been mixed and alloyed into an 80 ml vessel. Thesubstrate Cu-Be-Co surface’s texturized by laser to produce a pattern on the surface as a matrix,then functionalized diamond particles will be introduced into the matrix by cold isostatic press andsintering. For interpretation of the result, the main experimental procedures have beeninvestigated to characterize the properties of substrate (Cu-Be-Co), functionalized diamondparticles (diamond + Cu-Sn-Ti +stearic acid) and the metal matrix’s composites reinforced bydiamond particles. Hardness testing, X-Ray Diffraction (XRD), Scanning Electron Microscopy(SEM), Energy Dispersive X-Ray Spectroscopy (EDS), and tribological testing Pin-on-desk testsperformed as characterization techniques.Despite the presence of a variety of oxides, the reinforced material exhibited better tribologicalperformance than the unreinforced Cu-Be-Co when tested on a pin-on-disk. As a consequence,significantly reduces of wear resistance and coefficient of friction attained, up to 12 times lowerwear rate and 11% reduce of COF respectively.