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Interfacial microstructure and mechanical properties of diffusion-bonded joints of titanium TC4 (Ti-6Al-4V) and Kovar (Fe-29Ni-17Co) alloys

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Journal of Iron and Steel Research International 2017年第10期24卷 1023-1031页

作者： Ting-feng Song Xiao-song Jiang Zhen-yi Shao De-feng Mo De-gui zhu min-hao zhu Christina H.Young Zhi-ping Luo School of Materials Science and Engineering Southwest Jiaotong University Department of Material Engineering Chengdu Technological University Key Laboratory of Infrared Imaging Materials and Detectors Shanghai Institute of Technical PhysicsChinese Academy of Sciences Department of Chemistry and Physics Fayetteville State University

Diffusion bonding is a near net shape forming process that can join dissimilar materials through atomic diffusion under a high pressure at a high *** alloy TC4（Ti-6 Al-4 V）and 4 J29 Kovar alloy（Fe-29 Ni-17 Co）were diffusely bonded by a vacuum hot-press sintering process in the temperature range of 700-850°C and bonding time of 120 min,under a pressure of 34.66 *** microstructures and intermetallic compounds of the diffusion-bonded joints were characterized by optical microscopy,scanning electron microscopy,X-ray diffraction（XRD）and energy dispersive spectroscopy（EDS）.The elemental diffusion across the interface was revealed by electron probe *** properties of joints were investigated by micro Vickers hardness and tensile *** of EDS and XRD indicated that（Fe,Co,Ni）-Ti,TiNi,Ti_2Ni,TiNi_2,Fe_2 Ti,Ti_（17） Mn_3 and Al_6 Ti_（19） were formed at the *** the bonding temperature was raised from 700 to 850°C,the voids of interface were reduced and intermetallic layers were *** tensile strength of joints at 53.5 MPa was recorded by the sintering process at 850°C for 120 *** surface of the joint indicated brittle nature,and failure took place through interface of intermetallic *** on the mechanical properties and microstructure of the diffusion-bonded joints,diffusion mechanisms between Ti-6 Al-4 Vtitanium and Fe-29 Ni-17 Co Kovar alloys were analyzed in terms of elemental diffusion,nucleation and growth of grains,plastic deformation and formation of intermetallic compounds near the interface.

关键词： Titanium alloy Kovar alloy Diffusion-bonded joint Microstructure Mechanical property

Microstructures and interfacial interactions of Al_(2)O_(3)whiskers and graphene nano-platelets co-reinforced copper matrix composites

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Transactions of Nonferrous Metals Society of China 2022年第9期32卷 2935-2947页

作者： Zhen-yi Shao Heng-kang PAN Rui SHU Xiao-song JIANG min-hao zhu School of Materials Science and Engineering Southwest Jiaotong UniversityChengdu 610031China School of Materials and Environmental Engineering Chengdu Technological UniversityChengdu 611730China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung-Plasmaphysik52425 JülichGermany

The mechanical properties and microstructures of Al_(2)O_(3)whiskers and graphene nano-platelets(GNPs)co-reinforced Cu-matrix composites were ***-matrix composites with a variation of GNPs amount were fabricated by mechanical alloying followed by vacuum hot-pressing sintering and hot isostatic *** Cu-matrix composite with 0.5 wt.%GNPs(GNPs-0.5)suggests a good interfacial bonding of both Cu/C and Cu/Al_(2)O_(3)*** the hardness and compressive strength of Cu-matrix composites show a consistent tendency that firstly increases to a critical value and then decreases with increasing GNPs *** is suggested that the most possible strengthening mechanisms of both GNPs and Al_(2)O_(3)whisker working in the Cu-matrix composites involve energy dissipating and load transfer,as well as grain refinements for *** synergetic effect of GNPs and Al_(2)O_(3)whiskers is highlighted that the embedded GNPs would hinder the crack path generated at the Al_(2)O_(3)/Cu interface and enhance the already outstanding strengthening effect that Al_(2)O_(3)whiskers provide.

关键词： graphene Al_(2)O_(3)whisker Cu-matrix composite microstructure interfacial interaction

Fretting wear behavior of Inconel 690 in hydrazine environments

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Transactions of Nonferrous Metals Society of China 2014年第2期24卷 360-367页

作者：张晓宇任平弟彭金方朱旻昊西南交通大学牵引动力国家重点实验室摩擦学研究所成都610031

The friction and wear behaviors of Inconel 690 flat against Si3Ni4 ball were investigated using a hydraulic fretting test rig equipped with a liquid container device. The loads of 20-80 N, reciprocating amplitudes of 80-200 μm and two different environments （distilled water and hydrazine solution at temperatures from 25 to 90 ℃） were selected. The results show that the ratio of Ft/Fn is lower in distilled water than that in hydrazine solution at the same temperature in the slip regime. Both the ratio of Ft/Fn and wear volume gradually increase with increasing medium temperature under the given normal load and displacement amplitude. Besides the displacement amplitude and load, temperature also plays an important role for wear behavior of Inconel 690 material. The increase of temperature could reduce the concentration of dissolved oxygen, and promote the absorption reaction of hydrazine and dissolved oxygen. As a result, the oxidative corrosion rate is obviously lowered. Abrasive wear and delamination wear are the main mechanisms of Inconel 690 in distilled water. However, in hydrazine solution the cracks accompanied by abrasive wear and delamination wear are the main mechanisms.

关键词： fretting wear steam generator delamination wear

Effect of nitrogen ion implantation dose on torsional fretting wear behavior of titanium and its alloy

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Transactions of Nonferrous Metals Society of China 2017年第2期27卷 324-335页

作者：李正阳蔡振兵吴艳萍朱旻昊西南交通大学材料先进技术教育部重点实验室摩擦学研究所成都610031 中国工程物理研究院绵阳621900

Various doses of nitrogen ions were implanted into the surface of pure titanium, Ti6Al7Nb and Ti6Al4V, by plasma immersion ion implantation. Torsional fretting wear tests involving flat specimens of no-treated and treated titanium, as well as its alloys, against a ZrO2 ball contact were performed on a torsional fretting wear test rig using a simulated physiological medium of serum solution. The treated surfaces were characterized, and the effect of implantation dose on torsional fretting behavior was discussed in detail. The results showed that the torsional fretting running and damage behavior of titanium and its alloys were strongly dependent on the dose of the implanted nitrogen ions and the angular displacement amplitude. The torsional fretting running boundary moved to smaller angular displacement amplitude, and the central light damage zone decreased, as the ion dose increased. The wear mechanisms of titanium and its alloys were oxidative wear, abrasive wear and delamination, with abrasive wear as the most common mechanism of the ion implantation layers.

关键词： titanium alloy ion implantation fretting wear mechanism

Longitudinal assessment of peripheral organ metabolism and the gut microbiota in an APP/PS1 transgenic mouse model of Alzheimer’s disease

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Neural Regeneration Research 2025年第10期20卷 2982-2997页

作者： Hongli Li Jianhua Huang Di Zhao Lemei zhu Zheyu Zhang min Yi Weijun Peng Department of Integrated Traditional Chinese&Western Medicine The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina National Clinical Research Center for Metabolic Diseases ChangshaHunan ProvinceChina Hunan Academy of Chinese Medicine ChangshaHunan ProvinceChina Academician Workstation Changsha Medical UniversityChangshaHunan ProvinceChina

Alzheimer’s disease not only affects the brain,but also induces metabolic dysfunction in peripheral organs and alters the gut *** aim of this study was to investigate systemic changes that occur in Alzheimer’s disease,in particular the association between changes in peripheral organ metabolism,changes in gut microbial composition,and Alzheimer’s disease *** do this,we analyzed peripheral organ metabolism and the gut microbiota in amyloid precursor protein-presenilin 1(APP/PS1)transgenic and control mice at 3,6,9,and 12 months of ***-month-old APP/PS1 mice exhibited cognitive impairment,Alzheimer’s disease-related brain changes,distinctive metabolic disturbances in peripheral organs and fecal samples(as detected by untargeted metabolomics sequencing),and substantial changes in gut microbial composition compared with younger APP/PS1 ***,a strong correlation emerged between the gut microbiota and kidney metabolism in APP/PS1 *** findings suggest that alterations in peripheral organ metabolism and the gut microbiota are closely related to Alzheimer’s disease development,indicating potential new directions for therapeutic strategies.

关键词： Alzheimer’s disease APP/PS1 mice brain-kidney axis gut microbiota heart-brain axis liver-brain axis lung-brain axis microbiota-gut-brain axis peripheral organ metabolism spleen-brain axis

Dual motion fretting wear behaviors of titanium and its alloy in artificial saliva

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Transactions of Nonferrous Metals Society of China 2014年第1期24卷 100-107页

作者：张保荣蔡振兵甘雪琦朱旻昊于海洋四川大学口腔疾病研究国家重点实验室成都610041 航空总医院口腔科北京100012 西南交通大学材料先进技术教育部重点实验室摩擦学研究所成都610031

A dual motion combined by radial and tangential fretting was achieved on a modified hydraulic fretting wear test rig. The dual motion fretting tests of medical pure titanium （TA2） and Ti6Al7Nb alloy in artificial saliva were carried out under varied contact inclined angles （45° and 60°）, and the maximum imposed load varied from 200 to 400 N at a constant loading speed of 6 mm/min. The effects of the cyclic vertical force and the inclined angle were investigated in detail. Dynamic analysis in combination with microscopic examinations shows that the wear scar and plastic deformation accumulation present a strong asymmetry. The Ti6Al7Nb has better wear resistance than TA2 in artificial saliva at the same test parameters, and with the increase of inclined angle and decrease of imposed load, the wear reduces accordingly. The wear mechanisms of pure titanium TA2 and Ti6Al7Nb alloy under the condition of dual motion fretting in artificial saliva are abrasive wear, oxidative wear and delamination.

关键词： titanium alloy fretting wear dual motion fretting tangential fretting radial fretting wear mechanism

大气角动量变化以及对地球自转季节变化的激发

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天文学报 2002年第1期43卷 90-98页

作者：钟敏闫昊明朱耀仲雷小平中国科学院测量与地球物理研究所动力大地测量学开放室武汉430077

利用日本气象局ＡＭＩＰⅡ大气数值模式的输出结果，基于ＢＰ方法和ＳＰ方法计算了１９７９年至１９９６年大气角动量变化以及对地球自转季节变化激发的差异．利用最小二乘谐波拟合方法和气候平均图方法，分析了大气角动量的季节变化... 详细信息

利用日本气象局ＡＭＩＰⅡ大气数值模式的输出结果，基于ＢＰ方法和ＳＰ方法计算了１９７９年至１９９６年大气角动量变化以及对地球自转季节变化激发的差异．利用最小二乘谐波拟合方法和气候平均图方法，分析了大气角动量的季节变化，并与同时期采用ＮＣＥＰ再分析资料和ＪＭＡ客观分析资料计算的大气角动量进行比较．

关键词：大气解动量地球自转大气环流模式比较计划 AMIP 季节变化

区域协调发展视域下苏北地区旅游产业发展探究

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江苏商论 2025年第1期 48-52页

作者：朱昊武汉纺织大学马克思主义学院湖北武汉430073

推动区域协调发展是中国全面建设社会主义现代化强国道路上的重要基石。江苏省作为全国经济的领头羊,省内存在苏北、苏南地区经济发展差距较大的问题,是区域发展不协调的典型案例。苏北地区拥有丰富的自然人文资源,具备发展旅游业的天... 详细信息

推动区域协调发展是中国全面建设社会主义现代化强国道路上的重要基石。江苏省作为全国经济的领头羊,省内存在苏北、苏南地区经济发展差距较大的问题,是区域发展不协调的典型案例。苏北地区拥有丰富的自然人文资源,具备发展旅游业的天然优势。在此背景下,本文基于苏北地区发展现状,深入分析居民收入、产业结构、旅游景区布局对苏北旅游发展的制约作用。认为,要通过加大金融支持力度、推动产业融合发展、加强消费引导、优化旅游发展布局来推动苏北旅游业发展,从而带动苏北经济发展,促进江苏省区域协调发展。

关键词：区域协调发展江苏省苏北地区旅游产业

Primary parenchymal squamous cell carcinoma of the kidney:A case report

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World Journal of Clinical Cases 2025年第4期13卷 34-40页

作者： Zhi-Hui Zheng Bo Shao Chao-min Xu Ke Wang Jia-zhu Wen Li-Kang Luo Jia-Cheng Guan Department of Ultrasound The Second People’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Radiology Shulan(Quzhou)HospitalQuzhou 324000Zhejiang ProvinceChina Department of Radiology The Second People’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Pathology The Second people’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina

BACKGROUND Primary squamous cell carcinoma(SCC)of the renal parenchyma is extremely rare,with only nine cases *** SUMMARY This study reports a 51-year-old man with primary SCC of the renal *** patient was admitted with recurrent dull pain and discomfort in the right lumbar region,which had worsened over 2 weeks,accompanied by painful gross *** antigen(SCCA)levels were elevated,and imaging revealed a renal mass with associated *** patient underwent laparoscopic unilateral nephrectomy and lymph node *** pathology confirmed highly differentiated SCC with necrosis in the right renal parenchyma,with negative renal pelvis and *** pathological stage was *** months after surgery,the tumor recurred with involvement of the liver,right psoas major muscle,and inferior vena *** patient refused chemotherapy and succumbed to the disease 6 months postoperatively due to disease *** We report a case of primary SCC of the renal parenchyma,a rare renal *** clinical symptoms,laboratory tests,and imaging findings are nonspecific,making accurate and timely diagnosis *** to the literature,for patients with renal calculi accompanied by a renal mass,elevated serum SCCA levels,and magnetic resonance imaging showing cystic or cystic-solid masses within the kidney with pseudocapsules and heterogeneous mild enhancement,the possibility of this disease should be considered.

关键词： Renal tumor Renal parenchyma Squamous cell carcinoma Renal calculi Computed tomography Case report