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材料研究学报 2024年第1期38卷 23-32页

作者：杨仁贤马澍成蔡欣郑雷刚胡小强李殿中中国科学院金属研究所沈阳材料科学国家研究中心沈阳110016 中国科学技术大学材料科学与工程学院沈阳110016

采用蠕变持久试验机、扫描电子显微镜和透射电子显微镜等实验手段,系统研究了Ce元素添加对316LN奥氏体不锈钢(316LN钢)高温蠕变行为和微观组织的影响。结果表明,添加0.032%的Ce元素使316LN钢的蠕变断裂寿命显著提高。在温度为700℃、载... 详细信息

采用蠕变持久试验机、扫描电子显微镜和透射电子显微镜等实验手段,系统研究了Ce元素添加对316LN奥氏体不锈钢(316LN钢)高温蠕变行为和微观组织的影响。结果表明,添加0.032%的Ce元素使316LN钢的蠕变断裂寿命显著提高。在温度为700℃、载荷为150 MPa的条件下,添加0.032%Ce元素的316LN钢蠕变寿命为555.5 h,比不添加Ce元素时的蠕变寿命312.6 h提高了78%。在温度为600~700℃、载荷为150~200 MPa的条件下,未添加Ce元素和添加0.032%Ce元素的316LN钢对应的蠕变应力指数分别为7.64和9.07,蠕变激活能分别为415.3 kJ/mol和454.8 kJ/mol,蠕变门槛应力分别为61.7 MPa和76.6 MPa。蠕变断裂后的微观组织表明,添加0.032%的Ce元素显著促进了蠕变过程中316LN钢晶内Laves相的析出。晶内细小弥散分布的Laves相,在蠕变过程中能够阻碍位错移动,提高基体的蠕变抗力,从而有效改善蠕变性能。

关键词：金属材料 316LN奥氏体不锈钢高温蠕变稀土Ce 析出强化

海洋平台高压大流量液压管系振动特性分析与减振优化设计

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机电工程技术 2024年第4期53卷 248-251页

作者：马霖赵雷刚中海石油(中国)有限公司深圳分公司广东深圳518000 武汉船用机械有限责任公司武汉430084

随着职业安全健康要求的提高,海工平台对设备的健康、安全与环境(HSE)要求越来越高,平台上的设备异常振动直接影响船员职业安全健康和设备的使用寿命。海工平台的液压管系承担液压动力单元与驱动设备间液压油的输送,内部流体压力大、流... 详细信息

随着职业安全健康要求的提高,海工平台对设备的健康、安全与环境(HSE)要求越来越高,平台上的设备异常振动直接影响船员职业安全健康和设备的使用寿命。海工平台的液压管系承担液压动力单元与驱动设备间液压油的输送,内部流体压力大、流量高,同时承受液压泵旋转的流体脉动,若管系设计不合理将可能导致液压管系振动加剧。针对海洋平台高压、大流量液压管系减振要求,基于海洋平台液压系统的特点及液压管系布置,选用了谐响应分析作为液压管系振动特性分析方法。通过对某海洋油气生产平台液压潜液泵系统的液压管系进行振动特性分析,找出了初始液压管系可能存在的共振位置,提出了增加锚点和固定管夹的减振技术措施,再次采用谐响应方法对优化后的液压管系分析,结果满足工程要求。由此可见,针对大流量高压液压管系的减振优化设计,采用谐响应分析方法能够有效地得到管系振动薄弱环节,能够适用于其他类似液压设备振动优化分析。

关键词：液压管系振动特性谐响应分析优化设计

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载货汽车的搭铁设计探讨

汽车实用技术 2017年第8期14卷 34-36页

作者：马雷刚安徽江淮汽车集团股份有限公司安徽合肥230601

文章针对载货汽车电气系统中的重要组成部分——搭铁的设计进行了探讨。分别讨论了汽车搭铁的功能类型分类、各种搭铁连接方式的优缺点、及设计目标的设置和实施方案的选择,结合载货汽车具体搭铁布置与连接结构,最终从设计的角度总结出... 详细信息

文章针对载货汽车电气系统中的重要组成部分——搭铁的设计进行了探讨。分别讨论了汽车搭铁的功能类型分类、各种搭铁连接方式的优缺点、及设计目标的设置和实施方案的选择,结合载货汽车具体搭铁布置与连接结构,最终从设计的角度总结出一套搭铁建议方案,以便后期汽车电路的搭铁设计时参考使用。

关键词：搭铁设计电压降电阻

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浅谈汽车线束轻量化设计

汽车实用技术 2017年第7期14卷 55-57页

作者：马雷刚安徽江淮汽车集团股份有限公司安徽合肥230601

文章针对汽车电气系统中的重要组成部分——汽车线束的轻量化设计进行的探讨。分别从线束布置、接线原理设计、线束的包裹材料选择等几个方面去论证和介绍了汽车线束轻量化设计的一些基本方法,以便后期汽车线束设计人员参考使用。

关键词：线束布置线束轻量化设计

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某载货汽车自燃的分析

汽车实用技术 2014年第12期11卷 84-88页

作者：严法东马雷刚崔振亚安徽江淮汽车股份有限公司安徽合肥230601

本文首先通过驾驶员对自燃过程的描述和整车初查,确定起火区域。其次,通过对种种自燃原因的排除,确定该故障的起火点。最后,通过自燃的分析,识别设计、装调缺陷,提出预防方案。

关键词：自燃热害干涉短路

One-dimensional iridium-based nanowires for efficient water electrooxidation and beyond

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Nano Research 2022年第2期15卷 1087-1093页

作者： leigang Li Pengtang Wang Zifang Cheng Qi Shao Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

The sluggish reaction kinetics of oxygen evolution reaction(OER)has largely lowered the efficiency of electrochemical water *** represents one of the state-of-the-art electrocatalysts for promoting OER especially in acidic ***,it remains a formidable challenge to synthesize high-quality one-dimensional(1D)Ir-based nanostructures for improved electrocatalytic ***,a template-assisted synthesis method is reported wherein 1D porous Ir-Te nanowires(Ir-Te NWs)are synthesized with Te NWs serving as the *** Ir-Te NWs exhibit highly enhanced OER performance compared to commercial IrO_(2) and Ir/*** detail,the overpotentials to reach 10 ma cm^(-2) are 248 and 284 mV in 1 M KOH and 0.5 M H2S04,respectively,much lower than those of commercial *** Ir-Te NWs also show smaller Tafel slopes than commercial IrO_(2) and Ir/C,signifying faster reaction ***,much more durable OER activity can be maintained for Ir-Te NWs with negligible decay during 25 and 20 h stability tests in 1 M KOH and 0.5 M H_(2)SO_(4),*** analysis indicates that the significantly improved OER performance of Ir-Te NWs could be ascribed to the larger electrochemical surface area and smaller electrical *** significantly,the templated synthesis of Ir-Te NWs can be facilely extended to the fabrication of other metal-Te NWs including Ru-Te,Rh-Te and Pt-Te *** design and synthesis of 1D metal-based NWs in this work provide important inspiration for the synthesis of diversified 1D metallic nanostructures with distinctly enhanced catalytic performance and beyond.

关键词： Ir template nanowire water splitting oxygen evolution reaction

Reliability analysis based on a novel density estimation method for structures with correlations

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Chinese Journal of Aeronautics 2017年第3期30卷 1021-1030页

作者： Baoyu LI leigang ZHANG Xuejun ZHU Xiongqing YU Xiaodong ma College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China China Academy of Launch Vehicle Technology Beijing 100076 China

Estimating the Probability Density Function（PDF） of the performance function is a direct way for structural reliability analysis,and the failure probability can be easily obtained by integration in the failure ***,efficiently estimating the PDF is still an urgent problem to be *** existing fractional moment based maximum entropy has provided a very advanced method for the PDF estimation,whereas the main shortcoming is that it limits the application of the reliability analysis method only to structures with independent *** in fact,structures with correlated inputs always exist in engineering,thus this paper improves the maximum entropy method,and applies the Unscented Transformation（UT） technique to compute the fractional moments of the performance function for structures with correlations,which is a very efficient moment estimation method for models with any *** proposed method can precisely estimate the probability distributions of performance functions for structures with ***,the number of function evaluations of the proposed method in reliability analysis,which is determined by UT,is really *** examples are employed to illustrate the accuracy and advantages of the proposed method.

关键词： Fractional moment maximum entropy Probability density function Reliability analysis Unscented transformation

Face-centered cubic structured RuCu hollow urchin-like nanospheres enable remarkable hydrogen evolution catalysis

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Science China Chemistry 2022年第1期65卷 87-95页

作者： Juntao Zhang Jiabo Le Yuanting Dong Lingzheng Bu Ying Zhang Jun Cheng leigang Li Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Ningbo Institute of materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China

Ruthenium(Ru)is one of the most promising metals for its versatility in driving a wide range of catalytic ***,owing to the intrinsic preference of hexagonal close-packed(hcp)phase for bulk Ru,currently,it is still challenging to construct Ru-based nanomaterials with face-centered-cubic(fcc)phase for optimizing their performance towards potential ***,we report a facile wet-chemical method to directly create unconventional fcc-structured Ru-copper hollow urchin-like nanospheres(fcc-RuCu HUNSs)as a class of efficient pH-universal hydrogen evolution reaction(HER)***,this synthetic strategy can be expanded to prepare other fcc-Ru-based alloy ***,the novel fcc-RuCu HUNSs exhibit superior HER performance with the overpotential of only 25,34,40,and 26 m V to reach the current density of 10 ma cm^(-2)in 0.5 M H_(2)SO_(4),0.05 M H_(2)SO_(4),0.1 M KOH,and 1 M KOH,respectively,much lower than those of hcpRuCu HUNSs and commercial Pt/*** functional theory(DFT)calculations further indicate that their excellent pH-universal HER performance results from the optimized adsorption free energy of H and work *** work highlights the importance of phase control to design high-efficiency nanocatalysts for relevant catalytic reactions in energy conversion.

关键词： ruthenium phase control face-centered cubic hydrogen evolution catalysis pH-universal

Defect engineered 2D mesoporous Mo-Co-O nanosheets with crystalline-amorphous composite structure for efficient oxygen evolution

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Science China materials 2022年第12期65卷 3470-3478页

作者： Chuansheng He Xiaochen Hu Jia Wang Lingzheng Bu Changhong Zhan Bingyan Xu leigang Li Yunchao Li Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen University.Xiamen 361005China College of Chemistry Beijing Normal UniversityBeijing 100875China Graduate School of Integrated Sciences for Life Hiroshima UniversityHigashi-HiroshimaHiroshimaJapan

Two-dimensional(2D)mesoporous metal-oxide(hydroxide)nanomaterials with defects are promising towards the realization of efficient ***,we report a facile and effective one-pot solvothermal route to synthesize mesoporous Mo_(x)-Co-O hybrid nanosheets(NSs)which is composed of crystalline Mo_(4)O_(11) and amorphous cobalt *** to the corrosion of 1-octylamine at high temperatures,abundant mesoporous holes are created in situ over the Mo_(x)-Co-O hybrid NSs during the solvothermal process,which is beneficial to increasing the electrochemical surface *** dimension of the Mox-Co-O NSs,size of mesoporous and the concentration of defects can be easily modulated by controlling the molar ratio of Mo/*** measurements reveal that the 2D mesoporous Mo_(x)-Co-O NSs show an excellent activity for the oxygen evolution reaction with the highest catalytic activity of η_(10)=276 mV at 10 ma cm^(−2)in 1 mol L^(−1)*** adsorption of intermediates and abundant oxygen vacancies achieved by appropriate Mo doping are the two main factors that contribute to the excellent catalytic activity of Mo_(0.2)-Co-O *** work,with the construction of 2D metal-oxide(hydroxide)crystallineamorphous nanomaterials possessing abundant holes,oxygen vacancies and enhanced adsorption of intermediates,provides important insight on the design of more efficient catalysts.

关键词： mesoporous oxygen vacancy amorphous nanosheet oxygen evolution reaction