scholarly journals Spark Plasma Sintering of Copper Matrix Composites Reinforced with TiB2 Particles

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2602 ◽  
Author(s):  
Massimo Pellizzari ◽  
Giulia Cipolloni
Keyword(s):  
Spark Plasma Sintering ◽  
Metal Matrix ◽  
Milling Time ◽  
Tensile Tests ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Plasma Sintering ◽  
Uniform Dispersion ◽  
Spark Plasma ◽  
Tib2 Particles

The aim of this study is to fabricate a Cu-0.5wt%TiB2 composite by mechanical alloying (MA) and spark plasma sintering (SPS). Increasing the milling time, the powders are subjected firstly to a severe flattening process and then to intense welding, which promotes the refinement of TiB2 particles, their uniform dispersion in the metal matrix, and the adhesion between the two constituents. Sintered metal matrix composites (MMC) exhibit density values between 99 and 96%, which are generally decreased by increasing milling time in view of the stronger strain hardening. On the other side, the hardness increases with milling time due to the refinement of TiB2 particles and their improved distribution. The hardness of MMC is three times higher (225 HV0.05) than the starting hardness of atomized copper (90 HV0.05). Tensile tests show a loss of ductility, but ultimate tensile strength has been increased from 276 MPa of atomized copper to 489 MPa of MMC milled for 240 min. The thermal conductivity of MMC is comparable to that of atomized copper (300 W/mK), i.e., much higher than that of the commercial Cu-Be alloy (Uddeholm Moldmax HH, 106 W/mK) typically used for tooling applications.

Spark plasma sintering of Ti6Al4V metal matrix composites: Microstructure, mechanical and corrosion properties

2021 ◽  
Vol 865 ◽  
pp. 158875
Author(s):  
Neera Singh ◽  
Raghunandan Ummethala ◽  
Phani Shashanka Karamched ◽  
Rathinavelu Sokkalingam ◽  
Vasanth Gopal ◽  
...  
Keyword(s):  
Metal Matrix Composites ◽  
Spark Plasma Sintering ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Corrosion Properties ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Mechanical And Corrosion Properties

Spark Plasma Sintering of Ti-4.5Al-3V-2Fe-2Mo (SP-700)

2010 ◽  
Vol 654-656 ◽  
pp. 819-822
Author(s):  
Genki Kikuchi ◽  
Hiroshi Izui ◽  
Yuya Takahashi ◽  
Shota Fujino
Keyword(s):  
Spark Plasma Sintering ◽  
Room Temperature ◽  
Volume Fraction ◽  
Titanium Boride ◽  
Tensile Tests ◽  
X Ray Diffraction ◽  
X Ray ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Tib2 Particles

In this study, we focused on the sintering performance of Ti-4.5Al-3V-2Mo-2Fe (SP-700) and mechanical properties of SP-700 reinforced with titanium boride (TiB/SP-700) fabricated by spark plasma sintering (SPS). TiB whiskers formed in titanium by a solid-state reaction of titanium and TiB2 particles were analyzed with scanning electron microscopy and X-ray diffraction. The TiB/SP-700 was sintered at temperatures of 1073, 1173, and 1273 K and a pressure of 70 MPa for 10, 30, and 50 min. The volume fraction of TiB ranged from 1.7 vol.% to 19.9 vol.%. Tensile tests of TiB/SP-700 were conducted at room temperature, and the effect of TiB volume fraction on the tensile properties was investigated.

Sintering Behavior of TiC-Fe Based Composite Fabricated by Spark Plasma Sintering Using TiH2 Graphite Powders

2007 ◽  
Vol 534-536 ◽  
pp. 217-220 ◽  
Author(s):  
Sung Yeal Bae ◽  
In Sup Ahn ◽  
Ho Jung Cho ◽  
Chul Jin Kim ◽  
Dong Kyu Park
Keyword(s):  
Heat Treatment ◽  
Spark Plasma Sintering ◽  
Temperature Increase ◽  
Metal Matrix ◽  
Sintering Behavior ◽  
Matrix Composites ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Particulate Reinforced ◽  
Continuous Metal

TiC particulate reinforced Fe matrix composite compacts with controlled interfacial reaction was processed by spark plasma sintering after mechanical alloying. Milled powders were fabricated for 1-5 hours by spex shaker mill with the ball to powder ratio of 25:2. Metal matrix composites (MMCs) based on the Fe-40%TiC system can be synthesized by spark plasma sintering of the D’AE powders with TiH2-graphite powders under vacuum in the temperature range 1273-1473K for 5-20 min. TiC phase was formed by self combustion reaction with temperature increase. The specimen that was formed by sintering Fe-TiC powders displayed a microstructure of uniformly dispersed TiC grain in a continuous metal matrix. The densifications of the TiC-Fe materials were increased as the heat-treatment holding time increasing. In the same time, relative density and hardness of TiC-Fe sintering materials was increased.

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