Materials Literature
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利用高压釜模拟油田现场CO2驱油环境, 对N80和3Cr两种油管钢进行了CO2腐蚀试验, 通过扫描电镜(SEM)和X射线衍射仪(XRD)分析对比了腐蚀产物膜的腐蚀行为和特征, 并评价了三种缓蚀剂对两种油管钢的缓蚀性能, 计算了腐蚀速率和缓蚀效率, 对比了相应条件下的腐蚀产物膜表面形貌。结果表明,在同一CO2分压条件下, N80和3Cr钢在55 ℃时的腐蚀速率均比在30 ℃时的大, N80钢在30 ℃和55 ℃时的腐蚀速率明显大于3Cr钢, 其抗CO2腐蚀性能满足关系3Cr＞N80; N80腐蚀产物主要由FeCO3和少量CaCO3沉积物组成, 3Cr腐蚀产物主要由FeCO3及少量Cr7C3和Cr2C3组成。
Archive of work produced using the resources of the Imperial College High Performance Computing Service.
Metal matrix composites (MMCs) consisting of austenitic TRIP (TRansformation Induced Plasticity) steel reinforced by Mg-stabilized zirconia (Zr,Mg)O2 show martensitic phase transformations in both constituents during compressive deformation. The influence of the crystallographic orientation of individual (Zr,Mg)O2 par…
Electrocatalysis is an influential field in electrochemistry that has seen significant growth due to the application and ever-emerging synthetic techniques. The electrocatalytic ability of multi-walled carbon nanotubes (MWCNT) integrated with nanostructured materials has been a key area of research. These integrated n…
Abstract We report a facile fabrication of porous silicon nanofibers by a simple three-stage procedure. Polymer/silicon precursor composite nanofibers are first fabricated by electrospinning, a water-based spinning dope, which undergoes subsequent heat treatment and then reduction using magnesium to be converted into…
采用SEM-EDS研究了Mg处理钢中典型夹杂物特征，采用金相显微镜研究了Mg处理钢铸态和轧态显微组织特征。研究结果表明，FH40级船板钢经镁处理后，钢中夹杂物由Al2O3 + MnS逐渐变质成MgO•Al2O3 + MnS，随着镁处理强度的增加，变质趋于完全。未经镁处理FH40级船板钢铸态组织以“块状铁素体 + 珠光体”混合组织为主，镁处理后，铸态组织逐渐演变为“块状铁素体 + 珠光体 + 针状铁素体”的混合组织，且随镁处理强度的增加，针状铁素体数量明显升高。未经镁处理FH40级船板钢轧态组织以“铁素体 + 少量珠光体”混合组织为主，随着镁处理强度的增加，块状铁素体数量明显降低，铁素体条尺寸减少，且分布更为均匀，出现了大量针状铁素…
结垢对于油气田开采、注水及排水工艺的实施危害极大。碳酸盐垢是油气田开发生产中最常见的无机垢，研制新型碳酸盐垢防垢剂，有极重大的理论和实际意义。本文采用马来酸酐、乙醇胺、丙烯酸以及次亚磷酸钠为原料，按照一定的配比，采用自由基水溶液聚合，制备出膦基PTA-AA共聚物防垢剂。利用正交试验和单因素分析方法，研究了反应条件(反应时间、反应温度、反应物配比等)对产品防垢性能的影响；采用红外光谱法表征了产品的分子结构；探讨了防垢剂加量、防垢温度、防垢时间、溶液pH值、溶液矿化度等因素对产品防碳酸钙垢性能的影响，以及防垢剂对碳酸镁垢、碳酸钡垢的防垢性能。 Scale formation does great harm to the impleme…
Picture of the sequenced sample. The coin is 23.6 mm in diameter.
Archive of work produced using the resources of the Imperial College High Performance Computing Service.
The aim of this research is to develop highly conductive coating compounds for the emergence of comfortable and durable garments with integrated technology. Metals as filler particles for coating and printing pastes are the focus in this work. This, due to that metal provides excellent conductive properties particular…
This work aims to increase knowledge of a high-field varistor elaboration process based on soft chemistry and powder metallurgy. Varistors are voltage-dependant resistors, generally used as surge suppressors in various electrical systems.First, the effect of three synthesis parameters on the powders’ physico-chemical…
Since the source of the waste after the concrete complex, the waste concrete made from recycled coarse aggregate processing and many use restrictions, the recycled concrete technology and water treatment technology integration into a concrete drainage concrete, through experimental analysis of the recycled coarse aggr…
Optical flow is an important research area in the Computer Vision field, with the estimation of optical flow at occlusion still an open problem. Traditional approaches to this problem have either used additional terms in a regularization calculation (the flow still tends to “bleed” across occlusion boundaries) or a lo…
Activated carbons as emerging classes of porous materials have gained tremendous attention because of their versatile applications such as gas storage/separations sorbents, oxygen reduction reaction (ORR) catalysts and supercapacitor electrodes. This diversity originates from fascinating features such as low-cost, lig…
The composition and structure of the surface layer, formed as a result of dry friction of the steel disc and Al-Sn composites, were studied. The research showed that the final stage of composites wearing is the destruction of the thin surface layer formed as a result of the sample’s material and oxide particles mixing…
The removal of phosphorus from molten steel is a much studied topic. Even small amount of phosphorus in steel is harmful to mechanical properties. Unfortunately, it is common for phosphorus to be present in iron ores and the processes before steelmaking are poor at removing phosphorus. Chemically, phosphorus behaves m…
Saturable absorption (SA) of film composites based on carboxymethylcellulose (CMC) polymer with single-walled carbon nanotubes (SWNTs) and graphene (GR) was studied by the Z-and P-scan methods with femtosecond probing pulses at a wavelength of 1.06 μm. The values of the saturation intensities for composites GR-CMC and…
The synthesis of various morphologies of copper zinc tin sulfide (Cu2ZnSnS4) and copper tin sulfide (Cu2SnS3) nanocrystals were explored to find a more energy efficient synthesis. Reactions were all carried out at 220°C under either inert atmospheres or normal conditions. Variations in synthetic methods included react…
Introduction: Colorectal cancer remains the second most common cause of cancer related death in the UK. The successful management of rectal cancer has improved significantly with changes to surgical technique and the addition of pre-operative chemo-radiotherapy. A significant proportion of patients fail to respond to…
An integrated approach for biomass upgrading to fuels requires catalyst synthesis, characterization, and kinetic evaluation. The work was divided in three areas, 1-preparation and characterization of model catalysts containing metal oxide overcoats and metal nanoparticles synthesized by atomic layer deposition (ALD),…