Microstructure, and Physical and Mechanical Properties of Copper–Graphite Composites Obtained by In Situ Reaction Method

ABSTRACTMaterials with different allotropes can undergo one or more phase transformations based on the changes in the thermodynamic states. Each phase is stable in a certain temperature/pressure range and can possess different physical and mechanical properties compared to the other phases. The majority of material characterizations have been carried out for materials under equilibrium conditions where the material is stabilized in a certain phase and a lesser portion is devoted for onset of transformation. Alternatively, in situ measurements can be utilized to characterize materials while undergoing phase transformation. However, most of the in situ methods are aimed at measuring the physical properties such as dielectric constant, thermal/electrical conductivity and optical properties. Changes in material dimensions associated with phase transformation, makes direct measurement of the mechanical properties very challenging if not impossible. In this study a novel non-isothermal nanoindentation technique is introduced to directly measure the mechanical properties such as stiffness and creep compliance of a material at the phase transformation point. Single crystal ferroelectric triglycine sulfate (TGS) was synthetized and tested with this method using a temperature controlled nanoindentation instrument. The results reveal that the material, at the transformation point, exhibits structural instabilities such as negative stiffness and negative creep compliance which is in agreement with the findings of published works on the composites with ferroelectric inclusions.

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In-situ reaction synthesis and mechanical properties of quaternary MAX phase (Cr2/3Ti1/3)3AlC2

Ceramics International ◽

10.1016/j.ceramint.2020.06.055 ◽

2020 ◽

Vol 46 (14) ◽

pp. 22854-22860

Author(s):

Zhimou Liu ◽

Jia Yang ◽

Yuhai Qian ◽

Jingjun Xu ◽

Jun Zuo ◽

...

Keyword(s):

Mechanical Properties ◽

Max Phase ◽

Reaction Synthesis ◽

In Situ Reaction

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CHARACTERIZATION AND APPLICATION OF CONDUCTING POLYMER COATED TEXTILES

International Journal of Modern Physics B ◽

10.1142/s0217979209060750 ◽

2009 ◽

Vol 23 (06n07) ◽

pp. 1241-1247 ◽

Cited By ~ 2

Author(s):

LIJING WANG ◽

TONG LIN ◽

XUNGAI WANG

Keyword(s):

Mechanical Properties ◽

Physical Properties ◽

Conducting Polymer ◽

Physical And Mechanical Properties ◽

Fibrous Materials ◽

Conductive Coating ◽

Coating Durability

This paper reports on some physical properties of a conducting polymer, polypyrrole, coated textiles. Polypyrrole was coated on textiles chemically through in-situ solution or vapor polymerisation to produce conducting textiles. The effects of the conductive coating on the physical and mechanical properties of the fibrous materials are presented. The coating durability and conductivity of the textiles have also been examined.

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0543 Laboratory verification of the In-situ Reaction Method for Geological Storage of CO_2

The proceedings of the JSME annual meeting ◽

10.1299/jsmemecjo.2007.3.0_115 ◽

2007 ◽

Vol 2007.3 (0) ◽

pp. 115-116

Author(s):

Masayoshi SAKURAI ◽

Takatoshi ITO ◽

Kotaro SEKINE ◽

Kazuo HAYASHI

Keyword(s):

Geological Storage ◽

Reaction Method ◽

In Situ Reaction

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Efficacy of Activated Carbon In Situ to Oil Palm Frond Paper for Active Packaging on Mechanical Properties

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.506.607 ◽

2012 ◽

Vol 506 ◽

pp. 607-610 ◽

Cited By ~ 1

Author(s):

N. Thongjun ◽

Lerpong Jarupan ◽

Chiravoot Pechyen

Keyword(s):

Mechanical Properties ◽

Activated Carbon ◽

Moisture Content ◽

Oil Palm ◽

Physical And Mechanical Properties ◽

Active Packaging ◽

Modulus Of Rupture ◽

Oil Palm Frond ◽

Palm Frond

Oil palm frond pulp (OPF) was blended with activated carbon for the purpose of active packaging in this preliminary study. It was aimed to investigate the effect of in-situ activated carbon on physical and mechanical properties of the pulp handsheets made from OPF. Testing of property performances of the resulted handsheets included density, moisture content, thickness swelling, folding, tensile strength, %elongation, stiffness, and modulus of rupture. Ultimately, the intention is to use for prospected active packaging for fresh produce. OPF pulp was prepared by the kraft process. The pulp stock was mixed with different proportions of activated carbon (0, 10, 20, and 30% w/w). The results showed that an increased proportion of activated carbon decreased density and thickness selling, but had no effect on moisture content.

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Formation and properties of nanocomposites made up from solid aspen wood, melamine-urea-formaldehyde, and clay

Holzforschung ◽

10.1515/hf.2007.027 ◽

2007 ◽

Vol 61 (2) ◽

pp. 148-154 ◽

Cited By ~ 22

Author(s):

Xiaolin Cai ◽

Bernard Riedl ◽

S.Y. Zhang ◽

Hui Wan

Keyword(s):

Mechanical Properties ◽

Ball Mill ◽

Urea Formaldehyde ◽

Surface Hardness ◽

Physical And Mechanical Properties ◽

Water Soluble ◽

Aspen Wood ◽

Wood Polymer ◽

Density Surface

Abstract Wood polymer nanocomposites were prepared from solid aspen wood, water-soluble melamine-urea-formaldehyde (MUF) resin, and silicate nanoclays. The nanofillers were ground with a ball-mill before being mixed with the MUF resin and impregnated into the wood. The water-soluble prepolymer was mixed with the nanoclays at a mixing speed of 3050 rpm for 20 min to form impregnation solutions. Wood was impregnated with resin, which polymerized in situ under certain conditions. The physical and mechanical properties of the composite and the effect of ball-milling treatment of nanofillers on these properties were investigated. Significant improvements in physical and mechanical properties, such as density, surface hardness, and modulus of elasticity, were obtained for specimens impregnated with MUF resin and nanoclay-MUF resin mixtures. Ball-mill treatment favors dispersion of the nanofillers into the wood, but also appears to interfere with particle-resin adhesion.

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Structural, Physical and Mechanical Properties of Mg-Al Alloys Processed under CO2 Atmosphere

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.545.247 ◽

2012 ◽

Vol 545 ◽

pp. 247-250 ◽

Cited By ~ 1

Author(s):

Subramanian Jayalakshmi ◽

Khoo Chee Guan ◽

Kuma Joshua ◽

Manoj Gupta

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Yield Strength ◽

Magnesium Alloys ◽

Physical And Mechanical Properties ◽

Melting Process ◽

Al Alloys ◽

Compressive Yield Strength ◽

Protective Atmospheres

Magnesium alloys are the lightest structural materials known that are increasingly replacing steel and aluminium. However, due to its flammable nature, protective atmospheres are employed during Mg-alloy production. In this novel work, Mg-Al alloys with ~3 and ~5 wt.% Al were processed in CO2atmosphere, so as to utilize the CO2during the melting process. The cast Mg-Al alloys were extruded and studied for their structural, physical and mechanical properties. Results showed improvements in mechanical properties such as hardness, tensile strength and compressive yield strength. The improvement in properties was attributed to thein situformation of Al4C3arising due to molten metal-carbon interaction. It is noteworthy that the incorporation of CO2during processing did not adversely affect the mechanical properties of the alloys. Further, the process is eco-friendly as it not only utilized CO2, but also eliminates use of harmful cover gases.

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