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Evolution of γ' precipitates in GH4742 superalloy based on complete forging-heat treatment process

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Journal of Iron and Steel Research International 2022年第11期29卷 1873-1885页

作者： Qiang Tian he-yong qin Wen-yun Zhang Wen-wen Zhang Hai-zhu Li Qiang Du Xin-gang Liu High Temperature Materials Research Division Central Iron and Steel Research InstituteBeijing 100081China College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina

The temperature changes at the rim,1/2 radius,and bore of the turbine disk during the solution treatment were *** on the measured temperature data,solution treatment experiments with different cooling rates(14,51,and 93℃/min)were performed,and the solution temperatures were 1120 and 1080℃.At all three cooling rates,the multimodal size distribution of γ' precipitates was detected,and the size of γ' precipitates is inversely related to the cooling *** the secondary and tertiary γ' precipitates were found at a solution temperature of 1120℃,and the secondary γ' precipitates progressed from spherical(93 and 51℃/min)to flower-like(14℃/min)shape,with the flower-like γ' precipitates regulated by *** a solution temperature of 1080℃,the γ' precipitates evolve from cuboids(93 and 51℃/min)to irregular shapes(14℃/min).Irregular γ' precipitates are affected by the lattice mismatch between the matrix and the γ' precipitates.

关键词： GH4742 superalloy γ'precipitate Solution cooling rate Aggregation Diffusion neck

Recent progress in constructing fluorinated solid-electrolyte interphases for stable lithium metal anodes

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 270-291页

作者： Di Zhang Pengfei Lv Wei qin Xin he Yuanhua he Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province College of Civil Aviation Safety EngineeringCivil Aviation Flight University of ChinaGuanghan 618307China School of Chemical Engineering Sichuan UniversityChengdu 610065China

Lithium metal batteries(LMBs)are emerging as a promising energy storage solution owing to their high energy density and specific ***,the non-uniform plating of lithium and the potential rupture of the solid-electrolyte interphase(SEI)during extended cycling use may result in dendrite growth,which can penetrate the separator and pose significant short-circuit *** a stable SEI is essential for the long-term operation of the ***-rich SEI has garnered significant attention for its ability to effectively passivate electrodes,regulate lithium deposition,and inhibit electrolyte *** the structural components and preparation methods of existing fluorinated SEI is crucial for optimizing lithium metal anode *** paper reviews the research on optimizing LiF passivation interfaces to protect lithium metal *** focuses on four types of compositions in fluorinated SEI that work synergistically to enhance SEI *** instance,combining compounds with LiF can further enhance the mechanical strength and ionic conductivity of the *** metals with LiF significantly improves electrochemical performance at the SEI/anode interface,with a necessary focus on reducing electron tunneling ***,incorporating polymers with LiF offers balanced improvements in interfacial toughness and ionic conductivity,though maintaining structural stability over long cycles remains a critical area for future *** alloys combined with LiF increase surface energy and lithium affinity,challenges such as dendrite growth and volume expansion *** summary,this paper emphasizes the crucial role of interfacial structures in LMBs and offers comprehensive guidance for future design and development efforts in battery technology.

关键词： LiF lithium metal anodes solid-electrolyte interphase interface cycling stability

Grain size based low cycle fatigue life prediction model for nickel-based superalloy

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Transactions of Nonferrous Metals Society of China 2018年第10期28卷 2102-2106页

作者： Peng ZHANG Qiang ZHU Gang CheN he-yong qin Chuan-jie WANG School of Materials Science and Engineering Harbin Institute of Technology at WeihaiWeihai 264209China Central Iron&Steel Research Institute Beijing 100081China

Nickel-based superalloys are easy to produce low cycle fatigue(LCF)damage when they are subjected to high temperature and mechanical *** life prediction of nickel-based superalloys is of great importance for their reliable practical *** investigate the effects of total strain and grain size on LCF behavior,the high temperature LCF tests were carried out for a nickel-based *** results show that the fatigue lives decreased with the increase of strain amplitude and grain size.A new LCF life prediction model was established considering the effect of grain size on fatigue *** analyses indicate that the prediction accuracy of the new LCF life model is higher than those of Manson-Coffin relationship and Ostergren energy method.

关键词： nickel-based superalloy low cycle fatigue life prediction model grain size

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略论西藏残疾人就业问题及其对策

西藏研究 2011年第5期 108-113页

作者：何勤勇西藏大学思政教学部西藏拉萨850000

随着西藏经济社会的发展,西藏的残疾人事业有了很大进步。但是,由于自然和社会等方面因素的制约,西藏残疾人就业问题仍很突出,需要各级政府和社会高度重视,并努力采取有效措施来促进残疾人就业,使残疾人能自食其力,并同健全人一道共享... 详细信息

随着西藏经济社会的发展,西藏的残疾人事业有了很大进步。但是,由于自然和社会等方面因素的制约,西藏残疾人就业问题仍很突出,需要各级政府和社会高度重视,并努力采取有效措施来促进残疾人就业,使残疾人能自食其力,并同健全人一道共享西藏经济社会发展的成果。

关键词：西藏残疾人就业对策

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社会文化对幼儿教育政策和实践的影响

教育理论与实践 2013年第33期33卷 48-49页

作者：贺永琴贵阳幼儿师范高等专科学校

社会文化规定了幼儿教育政策及其实践的制度环境背景,社会文化的发展和进步也推动着幼儿教育政策和实践的发展变革。社会文化不仅制约着幼儿教育政策的目标,影响幼儿教育内容,同时还规定了幼儿教育的性质、地位及其发展组织形式。这种... 详细信息

社会文化规定了幼儿教育政策及其实践的制度环境背景,社会文化的发展和进步也推动着幼儿教育政策和实践的发展变革。社会文化不仅制约着幼儿教育政策的目标,影响幼儿教育内容,同时还规定了幼儿教育的性质、地位及其发展组织形式。这种文化规定性要求幼儿教育政策和实践必须能够适应不断发展变化中的文化及其内涵,并最终推进幼儿教育政策和实践不断走向科学化和合理化。

关键词：社会文化幼儿教育幼儿教育政策

用微卫星标记分析不同形态变异类型日本囊对虾的遗传多样性

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水产学报 2012年第10期36卷 1520-1528页

作者：何永琴苏永全毛勇王军厦门大学海洋与地球学院

选用9个多态性微卫星分子标记,分析我国近海浙江舟山(ZS)、福建厦门(XM)、广东惠来(HLQ及HLB)、海南陵水(LS)及广西北海(BH)日本囊对虾6个群体2种形态变异类型群体间的遗传变异,探讨了日本囊对虾的种质资源状况。结果显示,9个位点在6个... 详细信息

选用9个多态性微卫星分子标记,分析我国近海浙江舟山(ZS)、福建厦门(XM)、广东惠来(HLQ及HLB)、海南陵水(LS)及广西北海(BH)日本囊对虾6个群体2种形态变异类型群体间的遗传变异,探讨了日本囊对虾的种质资源状况。结果显示,9个位点在6个日本囊对虾群体中均为高度多态(PIC>0.5),共检测出235个等位基因;6个群体平均等位基因数在13.2～17.7;PIC平均值在0.851 2～0.903 5;平均观测杂合度(Ho)在0.729 6～0.788 9,平均期望杂合度(he)在0.880 5～0.925 1;表明群体遗传多样性水平较高。Hardy-Weinberg平衡检测显示,6个群体普遍存在杂合子缺失现象。分子变异方差分析(AMOVA)结果表明,遗传变异6.94%来自群体间,93.06%来自群体内。由ZS、XM和HLQ群体组成的形态变异类型Ⅰ与由HLB、LS和BH群体组成的形态变异类型Ⅱ之间的Fst均大于0.05,发生了中等程度的遗传分化;相同形态变异类型各群体间的Fst均小于0.05,遗传分化不明显。日本囊对虾群体间的遗传距离(DA)为0.178 5～0.621 8;UPGMA聚类分析表明,聚类关系符合距离隔离模式,BH群体和LS群体遗传距离最小,亲缘关系最近,它们首先聚在一起,然后与HLB群体聚为一支;XM群体和HLQ群体先聚在一起,再与ZS群体聚为另一支。

关键词：日本囊对虾不同形态变异类型微卫星标记遗传多样性

Magnetron sputtered nickel oxide with suppressed interfacial defect states for efficient inverted perovskite solar cells

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Journal of Energy Chemistry 2025年第1期100卷 348-355页

作者： Guoqiang Ma qin Tan Zhaoning Li Jingwei Xiu Jiafeng Wang Tianle Cheng Dong he Qiang Sun Xuhang Ma Francesco Lamberti Zhubing he Department of Materials Science and Engineering Institute of Innovative Materials (I2M) Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG)Southern University of Science and Technology (SUSTech) Core Research Facilities Southern University of Science and Technology Department of Chemical Sciences Department of Industrial Engineering University of Padova

Widely used spin-coated nickle oxide （NiOx） based perovskite solar cells often suffer from severe interfacial reactions between the NiOxand adjacent perovskite layers due to surface defect states,which inherently impair device performance in a long-term view,even with surface molecule *** this study,we developed high-quality magnetron-sputtered NiOxthin films through detailed process optimization,and compared systematically sputtered and spin-coated NiOxthin film surfaces from materials to *** sputtered NiOxfilms exhibit improved crystallinity,smoother surfaces,and significantly reduced Ni3+or Ni vacancies compared to their spin-coated ***,the interface between the perovskite and sputtered NiOxfilm shows a substantially reduced density of defect *** solar cells （PSCs） fabricated with our optimally sputtered NiOxfilms achieved a high power conversion efficiency （PCE） of up to 19.93%and demonstrated enhanced stability,maintaining 86.2% efficiency during 500 h of maximum power point tracking under one standard sun ***,with the surface modification using (4-(2,7-dibromo-9,9-dimethylacridin-10（9H）-yl)butyl)p hosphonic acid （DMAcPA）,the device PCE was further promoted to 23.07%,which is the highest value reported for sputtered NiOxbased PSCs so far.

关键词： Nickle oxide Magnetron sputter Defect Stability Perovskite solar cell

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论藏族传统文化在西藏学校中的传承与弘扬

西藏研究 2013年第4期 80-86页

作者：何勤勇王春焕西藏大学思政教学部西藏自治区社会科学院马理所西藏拉萨850000

在文化大发展大繁荣背景下,西藏学校要利用自身优势,充分发挥民族传统文化的传承和创新功能,使藏民族优秀传统文化在学校得到传承与弘扬。对此,要处理好主流文化教育与民族传统文化教育等的关系,拓展藏民族传统文化在学校传承与弘扬的途... 详细信息

在文化大发展大繁荣背景下,西藏学校要利用自身优势,充分发挥民族传统文化的传承和创新功能,使藏民族优秀传统文化在学校得到传承与弘扬。对此,要处理好主流文化教育与民族传统文化教育等的关系,拓展藏民族传统文化在学校传承与弘扬的途径,使藏民族优秀传统文化在青少年一代薪火相传,不断得到传承与弘扬。

关键词：藏族传统文化西藏学校传承弘扬

原位裂解碳对氮化铝基微波衰减陶瓷性能的影响

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无机材料学报 2018年第4期33卷 421-426页

作者：何永钦李晓云张景贤李晓光南京工业大学材料科学与工程学院南京210009 江苏先进无机功能复合材料协同创新中心南京210009 中国科学院上海硅酸盐研究所结构陶瓷工程研究中心上海200050

碳材料具有优异的吸波性能,但是难以在陶瓷基体中均匀分散。本研究通过酚醛树脂裂解的方法在氮化铝陶瓷基体中引入碳,研究了酚醛树脂的添加量对氮化铝陶瓷烧结性能、微观形貌、导热性能和介电性能的影响。研究发现,酚醛裂解形成的碳能... 详细信息

碳材料具有优异的吸波性能,但是难以在陶瓷基体中均匀分散。本研究通过酚醛树脂裂解的方法在氮化铝陶瓷基体中引入碳,研究了酚醛树脂的添加量对氮化铝陶瓷烧结性能、微观形貌、导热性能和介电性能的影响。研究发现,酚醛裂解形成的碳能够有效促进氮化铝陶瓷的致密化进程,降低烧结温度。当酚醛树脂含量为3wt%,1700℃烧结后陶瓷的致密度达到99.26%。此外,裂解碳的引入能够显著提高材料的导热性能,并在材料的气孔中和氮化铝的晶界处形成碳膜,从而显著提高材料的介电性能。当酚醛树脂含量为6wt%时,材料热导率达135.1W/(m·K),在X波段的介电损耗为0.3,表明材料具有良好的微波衰减能力,有望应用于大功率的微波电真空器件中。

关键词：酚醛树脂氮化铝热导率介电损耗