Materials Literature
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The Alpha Particle X-ray Spectrometer (APXS) on the Mars Exploration Rovers possesses the ability to detect carbon and oxygen within martian samples via Rutherford backscattering principles. Several consecutive measurements of the martian atmosphere by Spirit, paralleled by Monte Carlo simulations, provided an energy…
Over the last decade, polymers reinforced with natural fibre composites have been getting an increase attention from the academic world and various industries. Development of composites using natural fibres in combination with moisture and corrosion resistant synthetic fibres is one technique to enhance the strength a…
The energy of beta-radiation can be totally absorbed in a limited volume of tissue. The exposure can be therefore limited to the tissue to be treated. Practical radiation protection tends to be a job of dodging several factors to identify the most cost-effective solution. An example of reducing radiation doses by redu…
This work examines the effect of stress on the rate of sensitization, the rate of pitting corrosion and the rate of crack nucleation of aluminum alloy 5083-H116 aluminum. Stress corrosion cracking in aluminum superstructures of Naval vessels is a multibillion-dollar maintenance problem, which requires more scientific…
In the present report, the curing behavior of two thermoset resins containing silicon alkynyl group- PAR and PMR, and the correlation between the curing structure of resin and their thermal stability were investigated by FTIR, 13C NMR, DSC and TGA techniques. The IR and NMR results showed that the curing mechanism of…
Abstract : We proposed to develop a silver (Ag) nanoparticle (NP) contrast agent optimized for dualenergy (DE) contrast-enhanced (CE) breast x-ray imaging. CE digital breast imaging provides an accurate method for decomposition of images into distinct breast tissue and contrast agent signals. At present, DE-CE breast…
The Maintenance Plan for the Performance Assessments and Composite Analyses for the Area 3 and Area 5 Radioactive Waste Management Sites at the Nevada Test Site (National Security Technologies, LLC 2007a) requires an annual review to assess the adequacy of the performance assessments (PAs) and composite analyses (CAs)…
The use of noble metal nanoparticles such as silver clusters in future applications requires detailed knowledge about their structure and electronic properties. These properties alter significantly with size and shape of the clusters as well as with the properties of the environment. Especially the properties of suppo…
At the NRC's request, ORAU conducted surveys of the AAR Manufacturing site during the period of September 25 through September 27, 2012. The survey activities included walkover surveys and sampling activities. Once the survey team was onsite, the NRC personnel decided to forgo survey activities in the New Addition and…
The objective of this project is to develop a new class of hydrogen storage adsorbent, nanostructured porous organic polymers (POPs), through collaboration between Argonne National Laboratory and The University of Chicago. POPs have excellent thermal stability and tolerance to gas contaminants such as moisture. They a…
A comprehensive test program to evaluate nonmetallic materials use in the Hanford Tank Farms is described in detail. This test program determines the effects of simultaneous multiple stressors at reasonable conditions on in-service configuration components by engineering performance testing.
Transition-metal oxides (TMOs) show rich phase diagrams with various magnetic and electronic phases that arise from the complex interplay between spin, charge, orbital, and lattice degrees of freedom. The most prominent class of materials, which has attracted a lot of attention in the last decades, are probably high-t…
The state of the art in failure modeling enables assessment of crack nucleation, propagation, and progression to fragmentation due to high velocity impact. Vulnerability assessments suggest a need to track material behavior through failure, to the point of fragmentation and beyond. This eld of research is particularly…
摘要： 以吡啶、丙磺酸内酯和钨磷酸为原料，合成了离子液体型多金属氧酸盐（POM-IL）化合物[PyPS]nH3-nPW12O40·xH2O（n=1，2，3），用FT-IR、UV-Vis、1H NMR和元素分析等对其进行了表征。 结果显示，POM-IL化合物仍保持相应钨磷酸的Keggin结构，并存在吡啶丙磺酸的特征谱带，熔点均高于130 ℃，且随有机阳离子含量增加，熔点降低。 在紫外光下，n为1和2的POM-IL对水溶液中甲基橙的光催化降解活性与钨磷酸相似；在可见光下，POM-IL对水溶液中靛红的光催化降解活性相近，且均远高于钨磷酸。
Modeling of reacting flows in porous media has become particularly important with the increased interest in hydrogen solid-storage beds. An advanced type of storage bed has been proposed that utilizes oxidation of uranium hydride to heat and decompose the hydride, releasing the hydrogen. To reduce the cost and time re…
In the above-named article [ibid., vol. 2, no. 5, pp. 538-555, Sep. 2012], the authors would like to correct the following print error in the legend to Fig. 14, which should be read as follows: "Fig. 14. Broad-band active metamaterial in the THz region [69]. (a) Schematics for resonator patterns on a VO2 thin film and…
ENGLISH ABSTRACT: Natural fibre reinforced concrete (NFRC) is a type of concrete that has become of particular interest in recent years, due to its potential for being used as a sustainable and economically viable building material. Natural fibres are often cheap and widely available in developing nations. Sisal is on…
ENGLISH ABSTRACT: A comparative study of the chemical composition of linear low density polyethylene polymers, synthesised with 1 - hexene as comonomer was conducted. Catalyst trials were conducted on the linear low density 1 - hexene polymer grade material to evaluate alternative catalysts. A comparative analysis was…
ENGLISH ABSTRACT: Polymer composites, and in particular wood-polymer composites have become commercially and environmentally important materials. Studies in polyolefin-wood composites have mostly focused on polypropylene (PP) and polyethylene (PE). To our knowledge, no study has been undertaken on advancing impact pol…
ENGLISH ABSTRACT: Heterophasic copolymers (also known as HECO polymers) or often referred to only as impact copolymers or block copolymers comprise a polymer matrix with a dispersed rubbery copolymer phase. The polymer under investigation in this study consists of a polypropylene homopolymer matrix and ethylene-propyl…