Structure and Compressive Property of Heterocyclic Aramid Fiber

The F-3 fiber is a trade name of a recently developed type of heterocyclic para-aramid fibers in China. To investigate the relationship between structure and compressive properties for F-3 fiber, the structural parameters and compressive strength have been analyzed in detail compared with the Kevlar-49 fiber. The structural parameters were determined by wide-angle X-ray diffraction (WAXD) analysis and sonic velocity method. The results showed that the orientation of chains of F-3 fiber was higher than that of Kevlar-49 fiber. The results of the tensile recoil method showed that F-3 and Kevlar-49 fibers had approximate compressive strength. The analysis of relation between structure and mechanical properties suggested that the combination of orientation parameter and shear modulus between adjacent chains resulted in the approximate compressive strength of F-3 and Kevlar-49 fibers.

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Characterization of Epoxy-Layered Silicates Filled with Fly Ash-Based Geopolymer

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.754-755.225 ◽

2015 ◽

Vol 754-755 ◽

pp. 225-229 ◽

Cited By ~ 1

Author(s):

Yusrina Mat Daud ◽

Kamarudin Hussin ◽

Che Mohd Ruzaidi ◽

Azlin Fazlin Osman ◽

Mohd Mustafa Al Bakri Abdullah ◽

...

Keyword(s):

Fly Ash ◽

Morphological Study ◽

Layered Silicates ◽

Wide Angle ◽

X Ray Diffraction ◽

Compressive Properties ◽

Epoxy Nanocomposites ◽

Operative Method ◽

X Ray

Several epoxy nanocomposites incorporating layered silicates and fly ash based geopolymer were analysed by utilising the wide angle X-Ray diffraction (XRD) to characterise the nanoscale dispersion of the layered silicates. The morphological study of the nanocomposites using X-ray diffraction was an operative method to identify exfoliated and intercalated structures in the nanocomposite. It was discovered that the exfoliated structure was observed in the nanocomposites filled with montmorillonite (MMT) and fly ash-based geopolymers; while the intercalated structure was found in the nanocomposites with 3wt% of MMT. The results suggest that that the addition of fly ash-based geopolymers into epoxy/MMT mixture may contribute to superior compressive properties, in comparison to those nanocomposites without geopolymer filler addition.

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The Effect of Acrylic Bone Cement Solidification Conditions on the Compressive Property

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.197-198.1694 ◽

2011 ◽

Vol 197-198 ◽

pp. 1694-1699 ◽

Cited By ~ 2

Author(s):

Lan Feng Zhang ◽

Shi Rong Ge

Keyword(s):

Compressive Strength ◽

Bone Cement ◽

Solidification Process ◽

Compressive Property ◽

X Ray Diffraction ◽

Solidification Condition ◽

X Ray ◽

Hardness Tester ◽

Stirring Time ◽

Group D

A few experiments are conducted to investigate the effects of different solidification process on the physical hardness and compressive strength of the home-made bone cement. 24 bone cement samples under different mixing conditions are prepared. The compressive strength, hardness and phase composition of bone cement samples are measured with electronic universal machine, Shore hardness tester and X-ray diffraction(XRD) respectively. The results show that the maximum compressive strength of 24 samples is 96.27MPa, and obviously superior to that of the clinical application of bone cement. The hardness of bone cement of group C( powder 20g and fluid 10ml, 80.43HD) and group D(powder 20g and fluid 12ml, 86.60HD) is higher than 80HD which is the clinical requirement.It is found by X-ray diffraction that the higher crystallinity could produce finer grain, which results in higher compressive strength and hardness with better ductility and toughness. Giving consideration to compressive strength and physical hardness and crystallinity of D3(20g:12ml, with stirring speed as 30 times/min and stirring time as 90 seconds), the solidification condition is best.

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Effect of Hydration Products Transformation for Compressive Strength of Autoclaved Silicate Products

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.204-208.3644 ◽

2012 ◽

Vol 204-208 ◽

pp. 3644-3647

Author(s):

Chang Jun Ke ◽

Shu Ying Wang ◽

Jun Li Liu

Keyword(s):

Compressive Strength ◽

Steam Pressure ◽

Diffraction Peak ◽

Saturated Steam ◽

Hydration Products ◽

X Ray Diffraction ◽

Spectroscopy Analysis ◽

X Ray ◽

Diffraction Peaks ◽

The Relationship

the relationship between hydration products transformation and the compressive strength was studied with X-ray diffraction, infrared spectroscopy analysis. The results showed, 0.505nm hydrogarnets diffraction peaks weakened and 0.183nm CSH diffraction peak enhanced with different autoclaved time under 1.2MPa saturated steam pressure. 0.505nm hydrogarnets diffraction peak enhanced under lower saturated steam pressure for autoclaving 6h, then weaken under higher saturated steam pressure. And 0.183nm CSH diffraction peaks enhanced with different saturated steam pressure for autoclaving 6h. During autoclaving, hydrogarnet translate into Al-substituted calcium silicate hydrate (C-S-H). Transformation of hydration products is favorable for compressive strength of autoclaved sample.

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Compressive Properties of Hot-Rolled Mg-Zr-Ca Alloys for Biomedical Applications

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.197-198.56 ◽

2011 ◽

Vol 197-198 ◽

pp. 56-59 ◽

Cited By ~ 9

Author(s):

Ying Long Zhou ◽

Dong Mei Luo ◽

Wang Yu Hu ◽

Yun Cang Li ◽

Peter D. Hodgson ◽

...

Keyword(s):

Compressive Strength ◽

Biomedical Applications ◽

Compressive Modulus ◽

Human Bone ◽

Compressive Yield Strength ◽

X Ray Diffraction ◽

Compressive Properties ◽

X Ray ◽

Hot Rolled ◽

Compressive Tests

This paper investigated the microstructures and compressive properties of hot-rolled Mg-Zr-Ca alloys for biomedical applications. The microstructures of the Mg-Zr-Ca alloys were examined by X-ray diffraction analysis and optical microscopy, and the compressive properties were determined from compressive tests. The experimental results indicate that the hot-rolled Mg-Zr-Ca alloys with 1% Ca are composed of one single a phase and those alloys with 2% Ca consist of both Mg2Ca and a phase. The hot-rolled Mg-Zr-Ca alloys exhibit typical elongated microstructures with obvious fibrous stripe, and have much higher compressive strength and lower compressive modulus than pure Mg. All the studied alloys have much higher compressive yield strength than the human bone (90~140 MPa) and comparable modulus with the human bone, suggesting that they have a great potential to be good candidates for biomedical applications.

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Irregular Electrodeposition of Cu-Sn Alloy Coatings in [EMIM]Cl Outside the Glove Box with Large Layer Thickness

Coatings ◽

10.3390/coatings11030310 ◽

2021 ◽

Vol 11 (3) ◽

pp. 310

Author(s):

Lars Lehmann ◽

Dominik Höhlich ◽

Thomas Mehner ◽

Thomas Lampke

Keyword(s):

Layer Thickness ◽

Alloy System ◽

Liquid Solution ◽

Complexing Agents ◽

X Ray Diffraction ◽

X Ray ◽

Argon Stream ◽

Ionic Liquid Solution ◽

The Relationship ◽

Layer Composition

Thick Cu−Sn alloy layers were produced in an [EMIM]Cl ionic-liquid solution from CuCl2 and SnCl2 in different ratios. All work, including the electrodeposition, took place outside the glovebox with a continuous argon stream over the electrolyte at 95 °C. The layer composition and layer thickness can be adjusted by the variation of the metal-salts content in the electrolyte. A layer with a thickness of up to 15 µm and a copper content of up to ωCu = 0.86 was obtained. The phase composition was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray fluorescence (XRF). Furthermore, it was found that the relationship between the alloy composition and the concentration of the ions in the electrolyte is described as an irregular alloy system as according to Brenner. Brenner described such systems only for aqueous electrolytes containing complexing agents such as cyanide. In this work, it was confirmed that irregular alloy depositions also occur in [EMIM]Cl.

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