In-situ generated graphene from wheat flour for enhancing mechanical and electrical properties of copper matrix composites

2022 ◽  
pp. 142662
Author(s):  
Tao Yang ◽  
Wenge Chen ◽  
Hui Zhang ◽  
Longhai Ma ◽  
Yong-Qing Fu
Keyword(s):  
Electrical Properties ◽  
Wheat Flour ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
Mechanical And Electrical Properties

Preparation and properties of TiB2 nanoparticle reinforced copper matrix composites by in situ processing

2002 ◽  
Vol 52 (6) ◽  
pp. 448-452 ◽  
Author(s):  
J.P Tu ◽  
N.Y Wang ◽  
Y.Z Yang ◽  
W.X Qi ◽  
F Liu ◽  
...  
Keyword(s):  
Copper Matrix ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
In Situ Processing

Mechanical Behavior of TiB2 Nanoparticles Reinforced Cu Matrix Composites Synthesized by In-Situ Processing

2006 ◽  
Vol 510-511 ◽  
pp. 346-349 ◽  
Author(s):  
Dae Hwan Kwon ◽  
Khoa Xuan Huynh ◽  
Thuy Dang Nguyen ◽  
Pyuck Pa Choi ◽  
Myung-Gyu Chang ◽  
...  
Keyword(s):  
Copper Matrix ◽  
High Energy ◽  
Matrix Composites ◽  
Mechanical And Electrical Properties ◽  
Plasma Sintering ◽  
High Temperature Synthesis ◽  
Spark Plasma ◽  
Nanocomposite Powders ◽  
Tib2 Particles

Cu-TiB2 nanocomposite powders were in situ synthesized by combining high-energy ball milling of Cu-Ti-B elemental powder mixtures as precursors and subsequent self-propagating high temperature synthesis (SHS). Cu-40wt.% TiB2 was produced after SHS reaction and then diluted by copper to obtain desired homogeneous composites with 2.5, 5 and 10wt.%TiB2. Spark plasma sintering (SPS) was used to inhibit grain growth and thereby obtain fully Cu-TiB2 sintered bodies with nanocomposite structure. After SHS reaction, only Cu and TiB2 phases were detected in the SHS-product. Spheroidal TiB2 particles smaller than 250nm were formed in the copper matrix after SHS-reaction. Mechanical and electrical properties were investigated after SPS at 650°C for 30min under 50MPa. The electrical conductivity decreased from 75 to 54% IACS with increasing of TiB2 contents from 2.5 to 10wt.%. However, hardness increased from 56 to 97HRB. In addition, the tensile strength increased with increasing the TiB2 content.

Processing and Electrical Properties of Nano-Al2O3/Cu Composites

2017 ◽  
Vol 898 ◽  
pp. 984-991 ◽  
Author(s):  
Yi Liu ◽  
Jin Feng Leng ◽  
Zhi Wei Li ◽  
Pei Yu Zhang ◽  
Qiu Rui Wu
Keyword(s):  
Electrical Properties ◽  
Electrical Contact ◽  
Electrical Equipment ◽  
Copper Matrix ◽  
Vacuum Arc ◽  
Matrix Composites ◽  
Contact Materials ◽  
Mechanical And Electrical Properties ◽  
Electrical Contact Materials ◽  
Pure Cu

Copper matrix composites (CMCs) are widely used in electrical equipment and electrical contact materials due to their excellent electrical properties. Al2O3 powders are widely used as a reinforcing agent to enhance mechanical properties of MMCs. The xAl2O3/Cu (x =0, 0.2, 0.5, 0.7, and 1.0wt. %) composites were prepared via vacuum arc melting method. The mechanical and electrical properties were obtained by measuring the hardness and conductivity. The morphology of copper and Al2O3/Cu composites was characterized by optical microscopy (OM) and scanning electron microscopy (SEM). With the addition of Al2O3 from 0.2 wt. % to 1.0 wt. %, the relative densities of composites decreased from 98.5% to 97.0%. The hardness of the composites increased with increase in the Al2O3 powders content. The hardness of 1.0Al2O3/Cu composites was 57.9 HB, which was higher than that of pure Cu by 18.6%.. With the addition of Al2O3, the IACS% of Al2O3/Cu composites decreased from 88.97 to 86.16.

In situ preparation of copper-matrix composites

1993 ◽  
Vol 12 (20) ◽  
pp. 1635-1636
Author(s):  
A. Chrysanthou ◽  
G. Erbaccio ◽  
J. V. Wood
Keyword(s):  
Copper Matrix ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
In Situ Preparation

Low-Wear High-Friction Behavior of Copper Matrix Composites Dispersed With an In Situ Polymer Derived Ceramic

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
Enzo Castellan ◽  
Satish V. Kailas ◽  
Shimjith Madayi ◽  
Rishi Raj
Keyword(s):  
Copper Matrix ◽  
Matrix Composites ◽  
Wear Properties ◽  
Friction Behavior ◽  
Ceramic Phase ◽  
Copper Matrix Composites ◽  
Polymer Derived Ceramic ◽  
Friction And Wear Properties ◽  
Low Wear

We show that copper-matrix composites that contain 20 vol. % of an in situ processed, polymer-derived, ceramic phase constituted from Si-C-N have unusual friction-and-wear properties. They show negligible wear despite a coefficient of friction (COF) that approaches 0.7. This behavior is ascribed to the lamellar structure of the composite such that the interlamellar regions are infused with nanoscale dispersion of ceramic particles. There is significant hardening of the composite just adjacent to the wear surface by severe plastic deformation.

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