Microstructure and thermal conductivity of Cu/diamond composites with Ti-coated diamond particles produced by gas pressure infiltration

2015 ◽  
Vol 647 ◽  
pp. 941-946 ◽  
Author(s):  
Jianwei Li ◽  
Hailong Zhang ◽  
Yang Zhang ◽  
Zifan Che ◽  
Xitao Wang
Keyword(s):  
Thermal Conductivity ◽  
Gas Pressure ◽  
Pressure Infiltration ◽  
Diamond Particles

Effect of TiC Intermediate Layers on the Thermal Conductivity of Copper/Diamond Composites

2013 ◽  
Vol 275-277 ◽  
pp. 1610-1614 ◽  
Author(s):  
Qi Ping Kang ◽  
Xin Bo He ◽  
Shu Bin Ren ◽  
Bao Rui Jia ◽  
Xuan Hui Qu
Keyword(s):  
Thermal Conductivity ◽  
Diamond Particle ◽  
Pressure Infiltration ◽  
Diamond Composite ◽  
Diamond Particles ◽  
Intermediate Layers

TiC intermediate layers were formed on the surface of diamond particle with reaction of Ti powders in mixed molten NaCl-KCl salts. The copper/diamond composites with TiC-coated diamond particles were fabricated by pressure infiltration. Then the microstructure and thermal conductivity of the obtained copper/diamond composites were studied. The results showed the thermal conductivity of the composites with a density of 5.65 g/cm3reached 514 Wm-1K-1, which is much higher than with uncoated diamond. The TiC layers synthesized on diamond particles is shown to be an effective way to enhance the thermal conductivity of copper/diamond composite.

High thermal conductivity of Cu-B/diamond composites prepared by gas pressure infiltration

2018 ◽  
Vol 735 ◽  
pp. 1648-1653 ◽  
Author(s):  
Guangzhu Bai ◽  
Ning Li ◽  
Xitao Wang ◽  
Jinguo Wang ◽  
Moon J. Kim ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Gas Pressure ◽  
High Thermal Conductivity ◽  
Pressure Infiltration

The Influence of Cr-Coating on the Thermal Conductivity of Diamond/Cu Composites

2012 ◽  
Vol 557-559 ◽  
pp. 1654-1658
Author(s):  
Qi Ping Kang ◽  
Xin Bo He ◽  
Shu Bin Ren ◽  
Xuan Hui Qu
Keyword(s):  
Thermal Conductivity ◽  
Relative Density ◽  
Interface Problem ◽  
Molten Salt Method ◽  
Interface Thickness ◽  
Pressure Infiltration ◽  
Bonded Interface ◽  
Diamond Particles ◽  
Cr Coating ◽  
Infiltration Method

Diamond/Cu composites were fabricated by pressure infiltration method with Cr coating onto the diamond particles. The major challenge in the development of these composites is to obtain a well bonded interface between diamond particles and Cu. In this paper, an effective way to apply molten salt method coated chromium on diamond particles was used to solve the interface problem. The results showed that the bonded interface thickness of about 1μm was obtained. The relative density and thermal conductivity of coated composites were 99.5% and 396W/m K respectively, which were remarkably enhanced compared to that of uncoated composites.

Fabrication of Co-Continuous ceramic composite (C4) through gas pressure infiltration technique

2021 ◽  
Author(s):  
Krishnaraj Vijayan ◽  
Sindhumathi Ramalingam ◽  
Mohamed Raeez Akthar Sadik ◽  
A.S. Prasanth ◽  
Jayakrishnan Nampoothiri ◽  
...  
Keyword(s):  
Ceramic Composite ◽  
Gas Pressure ◽  
Pressure Infiltration ◽  
Infiltration Technique

Microstructure and Properties of Composites Prepared by Reactive Pressure Infiltration of Aluminium into Metal and Ceramic Powder Preforms

2014 ◽  
Vol 782 ◽  
pp. 523-526
Author(s):  
Andrej Opálek ◽  
Karol Iždinský ◽  
Štefan Nagy ◽  
František Simančík ◽  
Pavol Štefánik ◽  
...  
Keyword(s):  
Ceramic Powder ◽  
Nickel Aluminides ◽  
Gas Pressure ◽  
Alumina Powder ◽  
Pressure Infiltration ◽  
X Ray ◽  
Reactive Infiltration ◽  
Melting Temperatures ◽  
Ni Powder ◽  
Properties Of Composites

Nickel aluminides exhibit very attractive high temperature properties. However, due to high melting temperatures they are difficult to prepare. Gas pressure reactive infiltration is a relatively cheap technology that provides composites where nickel aluminides are formed due to mutual reaction between Ni powder and molten aluminium forced to penetrate into powder preform. The feasibility of this concept is demonstrated in this work. Ni powder and/or Ni+25 vol. % Al2O3 powder mixture, respectively, were mechanically pressed and then infiltrated with aluminium using 5 MPa argon gas pressure at the temperature of 750 °C for 120 s. Al/Al2O3 composite using loose alumina powder was prepared in similar manner for comparison. The microstructure of composites was observed by scanning electron microscopy and newly formed intermetallic phases were analysed by energy-dispersive X-ray spectroscopy. Relative elongations during additional thermal cycling up to 800 °C had been recorded. Composites were additionally characterized by hardness measurements.

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