scholarly journals Synthesis, Structure and Mechanical Properties of Bulk “Copper-Graphene” Composites

2018 ◽  
Vol 57 (2) ◽  
pp. 151-157 ◽  
Author(s):  
V.G. Konakov ◽  
O.Yu. Kurapova ◽  
E.N. Solovyeva ◽  
I.V. Lomakin ◽  
I.Yu. Archakov
Keyword(s):  
Pure Copper ◽  
Expanded Graphite ◽  
Planetary Mill ◽  
Strength Increase ◽  
Powder Metallurgy Process ◽  
Graphene Flakes ◽  
Tensile Strength Increase ◽  
Few Layer Graphene ◽  
Graphite Composites ◽  
Metallurgy Process

Abstract Bulk copper, copper-graphene and copper-graphite composites were produced from copper-thermally expanded graphite (TEG) powder mixtures with 0-3 wt.% TEG contents via modified powder metallurgy process that includes powder milling in a planetary mill at 350 rpm for 5 hours, compaction, and vacuum annealing at 1030 °C for 1 hour. Phase composition and microstructure of the composites were analysed by XRD and SEM techniques. According to Raman spectroscopy, TEG transforms into a few layer graphene flakes in case of composites with 0.1-1 wt.% of carbon additive, while for 3 wt.% of carbon additive it remains in the form of graphite. The addition of 0.1 wt.% TEG results in the tensile strength increase up to 160 MPa (from 93 MPa for pure copper specimen synthesized via the similar synthesis route). Vickers hardness obtained for Specimens under the study is independent fromthe composite composition.

scholarly journals The Electrical Property of Large Few Layer Graphene Flakes Obtained by Microwaves Assisted Exfoliation of Expanded Graphite

2016 ◽  
Vol 3 (2) ◽  
pp. 139-144 ◽  
Author(s):  
Azhar Pirzado ◽  
Guillaume Dalmas ◽  
Lam Nguyen-Dinh ◽  
Ivan Komissarov ◽  
Francois Le Normand ◽  
...  
Keyword(s):  
Electrical Property ◽  
Expanded Graphite ◽  
Layer Graphene ◽  
Graphene Flakes ◽  
Few Layer Graphene

CARPENTER CTS-204P ALLOY (MICRO MELT 20-4)

Alloy Digest ◽  
2010 ◽  
Vol 59 (1) ◽  
Keyword(s):  
Wear Resistance ◽  
Volume Fraction ◽  
Cold Work ◽  
Heat Treating ◽  
Corrosion And Wear ◽  
Corrosion Resistant ◽  
Die Steel ◽  
Powder Metallurgy Process ◽  
Wear And Corrosion ◽  
Metallurgy Process

Abstract Carpenter CTS-204P (Micro Melt 20-4) alloy is a highly wear- and corrosion-resistant, air-hardening martensitic cold-work stainless die steel produced using Carpenter’s Micro-Melt powder metallurgy process. The excellent wear resistance of the alloy is provided by a significant volume fraction of hard vanadium-rich carbides, while the outstanding corrosion resistance of the alloy is obtained as a result of the chromium-rich matrix. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on corrosion and wear resistance as well as forming, heat treating, and machining. Filing Code: SS-1051. Producer or source: Carpenter Specialty Alloys.

scholarly journals Interlayer Separation in Graphene Paper Comprising Electrochemically Exfoliated Graphene

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 865
Author(s):  
Dang Du Nguyen ◽  
TaeGyeong Lim ◽  
Soomook Lim ◽  
Ji Won Suk
Keyword(s):  
Energy Storage Devices ◽  
Storage Devices ◽  
Fundamental Properties ◽  
Exfoliated Graphene ◽  
Graphene Flakes ◽  
Fundamental Understanding ◽  
Fracture Tests ◽  
Graphene Paper ◽  
Few Layer Graphene ◽  
Force Displacement

The emergence of graphene paper comprising well-stacked graphene flakes has promoted the application of graphene-based materials in diverse fields such as energy storage devices, membrane desalination, and actuators. The fundamental properties of graphene paper such as mechanical, electrical, and thermal properties are critical to the design and fabrication of paper-based devices. In this study, the interlayer interactions in graphene paper were investigated by double cantilever beam (DCB) fracture tests. Graphene papers fabricated by flow-directed stacking of electrochemically exfoliated few-layer graphene flakes were mechanically separated into two parts, which generated force-displacement responses of the DCB sample. The analysis based on fracture mechanics revealed that the interlayer separation energy of the graphene paper was 9.83 ± 0.06 J/m2. The results provided a fundamental understanding of the interfacial properties of graphene papers, which will be useful for developing paper-based devices with mechanical integrity.

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