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Acta Metallurgica Sinica(English Letters) 2016年第2期29卷 205-216页

作者： Jun Luo Hong Yan Nan Zheng rong-shi chen The Group of Magnesium Alloys and Their Applications Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China

Four kinds of Mg alloys with different Zn and Ca concentration were selected to analyze the effect of Zn and Ca concentration on the microstructure and the mechanical properties of Mg-Zn-Ca alloys. It was found that Zn and Ca concentration has a great influence on the volume fraction, the morphology and the size of second phase. The Mg-1.95Zn- 0.75Ca （wt%） alloy with the highest volume fraction, continuous network and largest size of Ca2Mg6Zn3 phase showed the lowest elongation to failure of about 7%, while the Mg-0.73Zn-0.12Ca （wt%） alloy with the lowest volume fraction and smallest size of Ca2Mg6Zn3 phase showed the highest elongation to failure of about 37%. It was suggested that uniform elongations of the Mg-Zn-Ca alloys were sensitive to the volume fraction of the Ca2Mg6Zn3 phases, especially the network Ca2Mg6Zn3 phases; post-uniform elongations were dependent on the size of the Ca2Mg6Zn3 phase, especially the size of network Ca2Mg6Zn3 phase. Reduction in Zn and Ca concentration was an effective way to improve the room- temperature ductility of weak textured Mg-Zn-Ca alloys.

关键词： Mg-Zn-Ca alloys Ductility Hot rolling Texture Second phase

Effect of Solution Treatment on the Microstructure and Mechanical Properties of Sand-Cast Mg–9Gd–4Y–0.5Zr Alloy

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Acta Metallurgica Sinica(English Letters) 2018年第2期31卷 189-198页

作者： Jing-Li Li Na Zhang Xiao-Xuan Wang Di Wu rong-shi chen The Group of Magnesium Alloys and Their Applications Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China School of Materials Science and Engineering University of Science and Technology of China Hefei 230026 China AVIC Shenyang Liming Aero--Engine Group Corporation Shenyang 110043 China

Sand-cast Mg–9Gd–4Y–0.5 Zr（wt%） alloy was solution-treated at 500–565 ℃ in the time range of 0.5–30 h in air or vacuum to investigate its microstructure evolution and mechanical properties. The results showed that solution treatment temperature had a significant influence on the dissolving rate of eutectic phase and grain growth. Taken both of them into consideration, 510–520 ℃ was considered to be the optimum solution treatment temperature range for this *** should be noted that the trace（0.4–0.9 vol%） and insoluble cuboid-shaped phase precipitated during solution treatment was identified to be YH2, of which the hydrogen was thought to come from both the melting and solution heating *** addition, the 3D morphology and dissolving process of Mg24（Gd,Y）5 eutectic phases in the as-cast alloy were also discussed via in-situ observation under X-ray tomography.

关键词： Mg-Gd-Y-Zr alloy Solution treatment Microstructure Rare-earth hydride

Effects of Sb Content on Solidification Pathways and Grain Size of AZ91 Magnesium Alloy

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Acta Metallurgica Sinica(English Letters) 2015年第1期28卷 115-121页

作者： Dan-Hui Hou Song-Mao Liang rong-shi chen Chuang Dong En-Hou Han School of Material Science and Engineering Dalian University of Technology Institute of Metal Research Chinese Academy of Science Institute of Metallurgy Clausthal University of Technology

The phase constitution and solidification pathways of AZ91＋xSb（x = 0, 0.1, 0.5, 1, in wt%） alloys were investigated through ways of microstructure observation, thermal analysis technique, and thermodynamic calculation. It was found that the non-equilibrium solidification microstructure of AZ91＋xSb（x = 0.1, 0.5, 1） is composed of a-Mg matrix, b-Mg17Al12 phase, and intermetallic compound Mg3Sb2. The grain size of the alloys with different Sb contents was quantitatively determined by electron backscattered diffraction technique which shows no grain refinement in Sb-containing AZ91 alloy. Thermodynamic calculations are in reasonable agreement with thermal analysis results, showing that the Mg3Sb2 phase forms after a-Mg nucleation, thus impossible acts as heterogeneous nucleus for a-Mg dendrite. Besides,the solid fraction at dendrite coherency point（fDCPs） determined from thermal analysis decreases slightly with increasing Sb content, which is consistent with the fact that Sb does not refine the grain size of AZ91 alloy.

关键词： Mg–Al–Zn–Sb alloy Solidification pathways Nucleation Grain size Dendrite coherency

Effect of rolling reduction on deformation mechanism and twinning behavior of WE43 magnesium alloy

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Transactions of Nonferrous Metals Society of China 2022年第12期32卷 3901-3913页

作者： Qian-kun LI Hong YAN rong-shi chen shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

The effect of rolling reduction of the last pass on the dislocation slip and twinning behavior during direct hot rolling of a cast WE43 magnesium alloy at 480℃ was *** results showed that prismaticslip was always the main deformation mode during rolling at 480℃.In addition,the activated twinning type was associated with rolling ***{1012}extension twinning was activated at a slight rolling reduction(2%),while{1011}compression twinning and{1011}−{1012}double twinning were activated at larger rolling reduction(12%and 20%).Schmid factor calculation showed that the activation of{1012}extension twin variants followed the Schmid Law,whereas the activation of{1011}compression twin variants did not follow *** if the rolling reduction reached 20%,almost no dynamic recrystallization(DRX)grains were found,presumably because the amount of deformation required for DRX to occur was not reached.

关键词： magnesium alloy deformation twin variants recrystallization

Non-ultrawide bandgap CsPbBr_(3) nanosheet for sensitive deep ultraviolet photodetection

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Journal of Materials Science & Technology 2023年第28期159卷 251-257页

作者： Chun-Yan Wu Yu-Xuan Le Li-Yan Liang Jing-Yue Li Feng-Xia Liang shi-rong chen Xiao-Ping Yang Yu-Xue Zhou Lin-Bao Luo School of Microelectronics Hefei University of TechnologyHefei 230009China College of Physical Science and Technology Yangzhou UniversityYangzhou 225002China

In this study,we report the fabrication of a sensitive deep ultraviolet(DUV)photodetector by using CsPbBr_(3) nanosheets synthesized through confined-space growth at room *** peak pho-toresponse of the device upon illumination blueshifts with decreasing thickness and a 68 nm CsPbBr_(3) nanosheet based device displays a peak response to 265 nm illumination,showing responsivity and spe-cific detectivity of 85 mA/W and 4.05×1011 Jones at 3 V bias,*** simulation re-veals that the blueshift is associated with the wavelength-dependent absorption coefficient of CsPbBr_(3) nanosheet:incident light with shorter wavelengths can be absorbed on the superficial surface,while long-wavelength light has a larger penetration depth,leading to dominant DUV absorption in thinner CsPbBr_(3) *** work will shed light on the facile and cost-effective fabrication of DUV photode-tectors from non-ultrawide bandgap(UWBG)all-inorganic perovskite materials.

关键词： Non-ultrawide bandgap semiconductors CsPbBr_(3)nanosheet Wavelength-dependent absorption coefficient Sensitive DUV photodetector

Mg-Zn-Gd板材在Erichsen杯突试验过程中的组织演变和变形机理

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Transactions of Nonferrous Metals Society of China 2023年第3期33卷 728-742页

作者：陈勇闫宏王丹陈荣石中国科学院金属研究所师昌绪先进材料创新中心沈阳110016 中国科学技术大学材料科学与工程学院沈阳110016 山东科技大学材料科学与工程学院青岛266590 中国航发沈阳黎明航空发动机有限责任公司沈阳110043

对GZ31板材在室温和不同压下量条件下进行Erichsen杯突试验,获得4个杯突值分别为2.0、4.1、7.1和7.3 mm的样品。利用OM、SEM和EBSD技术手段研究杯突试验时样品的变形机理和断裂机理。结果表明,非基面织构的GZ31轧制板材杯突值可达7.3 m... 详细信息

对GZ31板材在室温和不同压下量条件下进行Erichsen杯突试验,获得4个杯突值分别为2.0、4.1、7.1和7.3 mm的样品。利用OM、SEM和EBSD技术手段研究杯突试验时样品的变形机理和断裂机理。结果表明,非基面织构的GZ31轧制板材杯突值可达7.3 mm。在杯突过程中,基面、锥面滑移以及{10■2}拉伸孪生是主要的变形方式。位错滑移受到第二相颗粒以及晶界阻碍,相互缠结形成微孔,最后导致材料的断裂。GZ31板材杯突值高是因为弱的非基面织构以及稀土元素有利于位错滑移和拉伸孪生去协调变形。

关键词：镁合金 Erichsen杯突试验位错滑移孪生

同时旋转起偏器和检偏器的红外椭圆偏振光谱仪研制

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红外与毫米波学报 1998年第5期17卷 321-326页

作者：黄志明金世荣陈诗伟陈敏辉史国良陈良尧褚君浩中国科学院上海技术物理研究所红外物理国家重点实验室

研制成测量材料光学特性的红外椭圆偏振光谱仪，其测量波长范围为２．５～１２．５μｍ，入射角度在２０°～９０°连续可变．系统数据采集、前放自动增益控制、入射角度和波长设置及扫描均由计算机自动控制．给出了金反射率和ＧａＡｓ... 详细信息

研制成测量材料光学特性的红外椭圆偏振光谱仪，其测量波长范围为２．５～１２．５μｍ，入射角度在２０°～９０°连续可变．系统数据采集、前放自动增益控制、入射角度和波长设置及扫描均由计算机自动控制．给出了金反射率和ＧａＡｓ体材料折射率椭偏测量，并与其它方法进行了对比。

关键词：红外椭圆偏振光谱仪椭偏参数光学常数

时效态WE43合金表面腐蚀产物膜的显微组织

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Transactions of Nonferrous Metals Society of China 2024年第5期34卷 1487-1495页

作者：蔡勇陈翌鹏闫宏陈荣石中国科学技术大学材料科学与工程学院沈阳110016 中国科学院金属研究所师昌绪先进材料创新中心沈阳110016 山东科技大学材料科学与工程学院青岛266590

时效态WE43合金在3.5 wt.%NaCl溶液中形成了致密且具有3层结构的腐蚀产物膜。采用透射电子显微镜分析膜层的显微组织。保护性膜层为3层结构,从内到外依次为RE_(2)O_(3)层、MgO与RE_(2)O_(3)的混合层和Mg(OH)2与RE_(2)O_(3)的混合层。析... 详细信息

时效态WE43合金在3.5 wt.%NaCl溶液中形成了致密且具有3层结构的腐蚀产物膜。采用透射电子显微镜分析膜层的显微组织。保护性膜层为3层结构,从内到外依次为RE_(2)O_(3)层、MgO与RE_(2)O_(3)的混合层和Mg(OH)2与RE_(2)O_(3)的混合层。析出相和稀土元素通过外氧化的方式形成大量稀土氧化物颗粒,这是保护性膜层形成的主要原因。RE_(2)O_(3)与MgO存在以下择优位向关系:(211)晶面和[231]晶向分别与MgO的(002)晶面和[110]晶向平行。因此,稀土氧化物颗粒可以填补疏松MgO膜层的空隙,从而提高了膜层的致密性。内层的RE_(2)O_(3)和MgO与RE_(2)O_(3)的混合层对于保护性膜层的形成起到了重要作用。致密的内层腐蚀产物膜能阻止腐蚀介质与镁基体发生反应。

关键词：镁合金腐蚀产物膜高分辨透射电镜析出相氧化

Clinical Study on the Prevention and Treatment of Intestinal Fibrosis in Ulcerative Colitis by Moxibustion

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Journal of Acupuncture and Tuina Science 2003年第2期1卷 14-17页

作者： WU Huan-gan AN Guang-qing LIU Hui-rong shi Zheng chen Han-ping LIU shi-min shi Yin XIAO Yuan-chun Shanghai Research Center of Acupuncture and Meridian 200030 China Shanghai Research Center of Acupuncture and Meridian 200030 China Shanghai Research Center of Acupuncture and Meridian 200030 China Shanghai Research Center of Acupuncture and Meridian 200030 China Shanghai Research Center of Acupuncture and Meridian 200030 China Shanghai Research Center of Acupuncture and Meridian 200030 China Shanghai Research Center of Acupuncture and Meridian 200030 China

Objective To observe the therapeutic effects and action mechanism of moxibustion in the treatment of intestinal fibrosis in ulcerative *** Tianshu (ST25) and Qihai (CV6) were the main acupoint; other points were used according to syndrome differentiation. Sixty-five patients were randomized into two groups: Group A in which 32 cases were treated by herbpartitioned moxibustion and group B in which 33 cases were treated by bran-partitioned moxibustion. The therapeutic effects and TGF-β1, I and III collagen expressions were measured before and after *** In group A, 17 cases were cured, 12 cases improved and 3 failed; in group B, 11 cases were cured, 16 cases improved and 6 cases failed. I, III collagen expressions were obviously inhibited in the two groups, in group A in *** In the prevention and treatment of intestinal fibrosis, moxibustion may reduce the expression of TGF-β1, and hence to block or inhibit the synthesis of I, III collagens, and improve the structure and function. Key Words Colonitis - Ulcerative - Collagen - Herbpartitioned Moxibustion - Bran-partitioned Moxibustion Foundation Item: This study supported by the National Natural Science Foundation of China, No.39970922, and Shanghai Science and Technology Committee and State Administration Bureau of Traditional Chinese MedicineTranslator: XIAO Yuan-chun

关键词： Colonitis Ulcerative Collagen Herbpartitioned Moxibustion Bran-partitioned Moxibustion

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胆固醇代谢与肿瘤免疫

四川大学学报（医学版） 2022年第2期53卷 335-341页

作者：罗娜时荣臣代荣阳缪洪明西南医科大学基础医学院泸州646000 陆军军医大学(第三军医大学)基础医学院生物化学与分子生物学教研室重庆400038

胆固醇是生物体内重要的脂质分子,参与细胞的膜性结构形成、胆汁酸代谢以及类固醇激素合成等,对细胞的结构和功能具有重要的调控作用。近年来,大量研究表明胆固醇代谢在肿瘤发生发展过程中发生了重编程。除了直接影响肿瘤细胞的生物学行... 详细信息

胆固醇是生物体内重要的脂质分子,参与细胞的膜性结构形成、胆汁酸代谢以及类固醇激素合成等,对细胞的结构和功能具有重要的调控作用。近年来,大量研究表明胆固醇代谢在肿瘤发生发展过程中发生了重编程。除了直接影响肿瘤细胞的生物学行为,胆固醇代谢重编程还可以调控肿瘤微环境中免疫细胞的抗瘤活性。本文回顾了肿瘤微环境中髓源抑制性细胞、肿瘤相关巨噬细胞、树突状细胞以及T淋巴细胞等免疫细胞的胆固醇代谢重编程及其相互作用。肿瘤微环境中胆固醇代谢与肿瘤免疫的关系呈现复杂性、多样性。肿瘤微环境中胆固醇代谢重编程在调控免疫细胞活性方面的异同以及具体调控的机制仍是一个尚未完全解决的问题。靶向干预免疫细胞的胆固醇代谢途径,有望成为胆固醇代谢在肿瘤免疫治疗的新策略。

关键词：胆固醇代谢肿瘤免疫调控肿瘤微环境

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