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Influence of Yttrium Ion-Implantation on the Growth Kinetics and Micro-Structure of NiO Oxide Film

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Plasma Science and Technology 2008年第1期10卷 43-45页

作者：靳惠明 adriana felix Majorri AROYAVE College of Mechanical Engineering Yangzhou University Yangzhou 225009 China College of Materials Engineering National University of Antiuquia Medellin 23715 Colombia

Isothermal and cyclic oxidation behaviours of pure and yttrium-implanted nickel were studied at 1000℃ in air. Scanning electronic microscopy （SEM） and transmission electronic microscopy （TEM） were used to examine the micro-morphology and structure of oxide scales formed on the nickel substrate. It was found that Y-implantation significantly improved the anti- oxidation ability of nickel in both isothermal and cyclic oxidizing experiments. Laser Raman microscopy was also used to study the stress status of oxide scales formed on nickel with and without yttrium. The main reason for the improvement in anti-oxidation of nickel was that Y- implantation greatly reduced the growing speed and grain size of NiO. This fine-grained NiO oxide film might have better high temperature plasticity and could relieve parts of compressive stress by means of creeping, and maintained a ridge character and a relatively low internal stress level. Hence yttrium ion-implantation remarkably enhanced the adhesion of protective NiO oxide scale formed on the nickel substrate.

关键词： ion-implantation laser Raman stress oxide yttrium

Growing kinetics and structural characterization of oxide film formed on La-doped Co-40Cr alloy

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Chinese Chemical Letters 2007年第5期18卷 577-580页

作者： Hui Ming Jin adriana felix Majorri Aroyave College of Mechanical Engineering Yangzhou University Yangzhou 225009 China College of Materials Engineering National University ofAntioquia Medelin 23715 Colombia

The isothermal and cyclic oxidizing kinetics of Co-40Cr alloy and its lanthanum ion-implanted samples were studied at 1000 ℃ in air by thermal-gravity analysis （TGA）. Scanning electronic microscopy （SEM） and transmission electronic microscopy （TEM）） were used to examine the oxidized film＇s morphology and the structure after oxidation. Secondary ion mass spectrum （SIMS） method was used to examine the binding energy change of chromium caused by La-doping and its influence on formation of Cr2O3 film. Laser Raman spectrum was used to examine the tress changes within oxidized films. It was found that lanthanum implantation remarkably reduced the isothermal oxidizing rate of Co-40Cr and improved the anti-cracking and anti-spalling properties of Cr2O3 film. The reasons were that the implanted lanthanum reduced the grain size and internal stress of Cr2O3 oxide, increased the high temperature plasticity of oxidized film. Lanthanum mainly existed in the outer surface of Cr2O3 film in the forms of fine La2O3 and LaCrO3 spinel panicles.

关键词： Oxidation Doping Raman spctrum SIMS Lanthanum

Effect of Yttrium Implantation on Microstructure and Adhesive Property of Nickel Oxide Film

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Journal of Rare Earths 2007年第S1期25卷 537-540页

作者：靳惠明周小卫 felix adriana College of Mechanical Engineering Yangzhou University College of Materials Engineering National University of Antiuquia

Isothermal and cyclic oxidation behaviors of pure and yttrium-implanted nickel were studied at 1000 ℃ in the air. Scanning electronic microscopy (SEM) and transmission electronic microscopy (TEM) were used to examine the micro-morphology and structure of oxide scales formed on nickel substrate. It was found that Y-implantation greatly improved the anti-oxidation ability of nickel both in isothermal and cyclic oxidizing experiments. Laser Raman Microscopy was also used to study the stress status of oxide scales formed on nickel with and without yttrium. The main reason for the improvement in anti-oxidation of nickel was that Y-implantation greatly reduced the growing speed and grain size of NiO. This fine-grained NiO oxide film might have better high temperature plasticity and could relieve parts of compressive stress by means of creeping, and maintained ridge character and relatively lower internal stress level, hence remarkably enhanced the adhesion of protective NiO oxide scale formed on nickel substrate. The actual existing form of yttrium in oxide can be Y2O3 and NiY2O4 spinel nanometric particles, and even be Y3+ ions segregated at NiO grain boundaries.

关键词： ion implantation laser Raman stress yttrium NiO rare earths

离子注钇对镍900℃高温氧化行为及氧化膜性能的影响研究

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物理学报 2006年第11期55卷 6157-6162页

作者：靳惠明 felix adriana Aroyave Majorri 扬州大学机械工程学院扬州225009 国立安第克大学材料科学与工程学院哥伦比亚麦德林23715

采用热重分析对纯镍及其表面离子注钇样品在900℃空气中的恒温氧化动力学规律进行了研究.用扫描电子显微镜和透射电子显微镜对含钇和不含钇氧化膜的微观形貌及结构进行了观测.用声发射方法对氧化膜在恒温生长阶段和空冷阶段的开裂与剥... 详细信息

采用热重分析对纯镍及其表面离子注钇样品在900℃空气中的恒温氧化动力学规律进行了研究.用扫描电子显微镜和透射电子显微镜对含钇和不含钇氧化膜的微观形貌及结构进行了观测.用声发射方法对氧化膜在恒温生长阶段和空冷阶段的开裂与剥落进行了实时监测,根据相应的氧化膜开裂模型,对声发射信号在时域和数域上的分布情况进行了分析.结果表明离子注钇显著降低了镍的恒温氧化速率,提高了表面NiO膜的抗开裂和抗剥落性能.离子注钇提高镍抗氧化性能的原因主要是钇细化了表面NiO膜的晶粒、提高了氧化膜的高温塑性和蠕变能力,并显著降低了Ni/NiO界面缺陷的数量和大小.

关键词：高温氧化应力声发射离子注入

注镧Co-Cr合金表面氧化膜生长规律与微观结构表征

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物理学报 2008年第1期57卷 561-565页

作者：靳惠明 felix adriana Arovave Majorri 扬州大学机械工程学院扬州225009 国立安第克大学材料科学与工程学院哥伦比亚麦德林

采用热重分析(TGA)方法研究了离子注镧对Co-40Cr合金在1000℃空气中的恒温氧化和循环氧化行为的影响.用扫描电镜(SEM)和透射电镜(TEM)对表面氧化膜的微观形貌和结构进行了研究.用二次离子质谱(SIMS)对合金表面元素铬结合能的变化情况以... 详细信息

采用热重分析(TGA)方法研究了离子注镧对Co-40Cr合金在1000℃空气中的恒温氧化和循环氧化行为的影响.用扫描电镜(SEM)和透射电镜(TEM)对表面氧化膜的微观形貌和结构进行了研究.用二次离子质谱(SIMS)对合金表面元素铬结合能的变化情况以及氧化膜中元素镧的深度分布进行了测试,并用激光拉曼谱(Raman)对掺杂镧引起的氧化膜内应力改变进行了测量研究.结果表明,离子注镧后Co-40Cr合金在1000℃空气中的恒温氧化速率显著降低,表面Cr2O3氧化膜的抗开裂与抗剥落性能明显增强.原因主要是镧细化了Cr2O3氧化膜的晶粒尺寸、降低了氧化膜内应力水平并增加了氧化膜的高温塑性.稀土镧主要以La2O3和LaCrO3的形式存在于Cr2O3氧化膜的外侧,通过阻碍膜内阳离子扩散影响膜的生长规律,进而改善氧化膜的黏附性能.

关键词：离子注入镧拉曼谱二次离子质谱

离子注镧对镍表面氧化膜生长机制及应力水平的影响

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四川大学学报（工程科学版） 2009年第6期41卷 114-118页

作者：靳惠明 felix adriana AROYAVE Majorri 扬州大学机械工程学院江苏扬州225009 国立安第克大学材料科学与工程学院哥伦比亚麦德林23715

对纯镍及其表面离子注镧样品在900℃空气中的恒温氧化规律进行了研究。采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)对NiO膜的微观形貌和结构进行测试。采用激光拉曼(Raman)谱和X射线衍射仪(XRD)对两种样品表面氧化膜的应力状态进行... 详细信息

对纯镍及其表面离子注镧样品在900℃空气中的恒温氧化规律进行了研究。采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)对NiO膜的微观形貌和结构进行测试。采用激光拉曼(Raman)谱和X射线衍射仪(XRD)对两种样品表面氧化膜的应力状态进行测量。采用二次离子质谱(SIMS)对氧化膜内元素Ni、O和La的深度分布情况进行了测量。结果表明,离子注镧显著降低了镍的恒温氧化速率,细化了表面NiO膜的晶粒尺寸,同时,将氧化膜生长的生长机制由未注镧前Ni2+阳离子向外扩散转变为注镧后O2-阴离子向内扩散为主。X射线衍射和激光拉曼测量均反映出注镧引起的膜内应力降低效应,并且,结合氧化膜内应力深度分布的不均匀性及膜生长过程中存在的稀土元素效应对两种应力测量结果之间存在的偏差进行了细致分析。

关键词：离子注入二次离子质谱拉曼镧氧化镍

Neuronal trafficking as a key to functional recovery in immune-mediated neuropathies

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Neural Regeneration Research 2024年第11期19卷 2331-2332页

作者： felix Kohle Michael Schroeter Department of Neurology University of Cologne and University Hospital CologneCologneGermany

Immune-mediated neuropathies are rare diseases of the peripheral nervous system(PNS),substantially affecting patients’functionality and quality of *** are amenable to immunomodulatory treatments,which in many cases stabilize disease progression,but long-term deficits persist in many *** long-term deficits are particularly observed in monophasic autoimmune neuropathies like Guillain-Barrésyndrome and also in chronic variants,e.g.,chronic inflammatory demyelinating neuropathy(Fadia et al.,2019).

关键词： diseases autoimmune

Biotransformation of 6:2 fluorotelomer sulfonate(6:2 FTS)in sulfur-rich media by Trametopsis cervina

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Frontiers of Environmental Science & Engineering 2024年第9期18卷 17-26页

作者： felix Grimberg Thomas M Holsen Sujan Fernando Siwen Wang Department of Civil and Environmental Engineering Clarkson UniversityPotsdamNew York 13699USA

Biotransformation of 6:2 fluorotelomer sulfonate(6:2 FTS)by two species of white-rot fungi,Pleurotus ostreatus(***)and Trametopsis cervina(***),was investigated in a sulfurrich medium designed to stimulate production of lignin-degrading *** of 6:2 FTS was observed by *** over the study period of 30 d,but not by *** rates were comparable to those found in other studies investigating mixed culture degradation in nonsulfur limiting media,with approximately 50 mol%of applied 6:2 FTS removed after 30 *** transformation products were short-chain perfluorocarboxylic acids(PFCAs),including PFHxA(2.27 mol%),PFPeA(0.24 mol%),and PFBA(0.28 mol%).The main intermediate products include 5:2 sFTOH(16.3 mol%)and 5:3 FTCA(2.99 mol%),while 6:2 FTCA,6:2 FTuCA,and 5:2 ketone were also identified at low *** 60 mol%of detected products were assigned to the major pathway to 5:2 ketone,and 40 mol%were assigned to the minor pathway to 5:3 *** overall molar balance was found to decrease to 75 mol%by Day 30,however,was closed to near 95 mol%with a theoretical estimation for the volatile intermediates in the headspace,5:2 ketone and 5:2 *** different capabilities of the two white-rot fungal species for 6:2 FTS biotransformation in sulfur-rich media suggest that the enzyme processes of *** to de-sulfonate 6:2 FTS may be unrelated to sulfur metabolism.

关键词： White-rot fungus 6:2 fluorotelomer sulfonate(6:2 FTS) Biotransformation Sulfur-rich medium Intermediate products

The semiotics of humor in cultural trauma:a pilot study on digital methodology concerning the evolution and overcoming of trauma through humor on the example of Rick and Morty

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Language and Semiotic Studies 2024年第2期10卷 203-221页

作者： felix Poschinger Christopher Shannon University of Hamburg Hamburg20148Germany Independent TokyoJapan

This pilot study on humor in cultural trauma uses innovative digital methodologies in speech recognition and social media analysis via Postman and Python in the Twitter API v2 to propose different forms to gather and analyze empirical data on semiotics and humor to be used in a broader *** given example of humorous instances on the cultural trauma of 9/11 in the fictional sitcom Rick and Morty is limited but corroborated by a second example that is structurally different from the first:humor about 9/11 in stand-up comedy by Louis *** on the data,humor in trauma seems to undergo a 5-phase-typology related to the Kübler-Ross model of grief,which is mended by the(digital)participation of ***,we argue,both shapes the discourse on humor in trauma and overcomes the traumatic effects through humorous discourse.

关键词： cultural trauma humor theory Kübler-Ross model collective memory