|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Influences of pouring temperature and cooling rate on microstructure and mechanical properties of casting Al-Si-Cu aluminum alloy显示文摘This paper investigated the influences of pouring temperature and cooling rate on the microstructure development and mechanical properties for casting Al-Si-Cu aluminum alloy.The microstructure of the as-cast samples was characterized by an optical microscope.The results showed that the dendrite arm spacing(DAS,λ) is well refined by pouring at a higher temperature.The λ decreases with increasing pouring temperature due to the multiplication of the nucleation sites in the superheating liquid melt,and the mechanical properties,such as microhardness and ultimate tensile strength increase correspondingly,while the elongation decreases.The relationships between microhardness and λ for the samples cooled in metal mould and sand mould,are given as HV=118.9 1.246λ and HV=115.2 1.029λ,respectively.The effects of the cooling rate controlled by using permanent mould casting and sand mould casing processes(the cooling medium is air and sand,respectively) on the dendrite arm spacing and mechanical properties are similar to the effect of the pouring temperature. | Xiaowu HU Fanrong AI Hong YAN | 2012 | Acta Metallurgica Sinica(English Letters)2012，25，4： | 7 |
| 2 | Research on lamellar structure and micro-hardness of directionally solidified Sn-58Bi eutectic alloy显示文摘In this work,the Sn-58Bi(weight percent) eutectic alloy was directionally solidified at a constant temperature gradient(G = 12 K.mm-1) with different growth rates using a Bridgman type directional solidification furnace.A lamellar microstructure was observed in the Sn-58Bi samples.The lamellar spacing and micro-hardness of longitudinal and transversal sections were measured.The values of lamellar spacing of both longitudinal and transversal sections decrease with an increase in growth rate.The microhardness increases with an increase in the growth rate and decreases with an increase in the lamellar spacing.The dependence of lamellar spacing on growth rate,and micro-hardness on both growth rate and lamellar spacing were obtained by linear regression analysis.The relationships between the lamellar spacing and growth rate,microhardness and growth rate,and micro-hardness and lamellar spacing for transversal and longitudinal sections of Sn-58Bi eutectic alloy were given.The fitted exponent values obtained in this work were compared with the previous similar experimental results and a good agreement was obtained. | Hu Xiaowu Li Ke Ai Fanrong | 2012 | China Foundry2012，9，4： | 1 |
| 3 | Functional groups to modify g-C3N4 for improved photocatalytic activity of hydrogen evolution from water splitting显示文摘Rational modification by functional groups was regarded as one of efficient methods to improve the photocatalytic performance of graphitic carbon nitride(g-C3 N4).Herein,g-C3 N4 with yellow(Y-GCN)and brown(C-GCN)were prepared by using the fresh urea and the urea kept for five years,respectively,for the first time.Experimental results show that the H2 production rate of the C-GCN is 39.06μmol/h,which is about 5 times of the Y-GCN.Meantime,in terms of apparent quantum efficiency(AQ.E)at 420 nm,C-GCN has a value of 6.3%and nearly 7.3 times higher than that of Y-GCN(0.86%).The results of XRD,IR,DRS,and NMR show,different from Y-GCN,a new kind of functional group of—N=CH—was firstly in-situ introduced into the C-GCN,resulting in good visible light absorption,and then markedly improving the photocatalytic performance.DFT calculation also confirms the effect of the—N=CH—group band structure of g-C3N4.Furthermore,XPS results demonstrate that the existence of—N=CH—groups in C-GCN results in tight interaction between C-GCN and Pt nanoparticles,and then improves the charge separation and photocatalytic performance.The present work demonstrates a good example of'defect engineering'to modify the intrinsic molecular structure of g-C3N4 and provides a new avenue to enhance the photocatalytic activity of g-C3N4 via facile and environmental-friendly method. | Fan Yu Laichun Wang Qiuju Xing Dengke Wang Xunheng Jiang Guangchao Li Anmin Zheng Fanrong Ai Jian-Ping Zou | 2020 | Chinese Chemical Letters2020，31，6： | 1 |
| 4 | Effects of rare earth Er additions on microstructure development and mechanical properties of die-cast ADC12 aluminum alloy 显示文摘 | HU Xiaowu JIANG Fugang AI Fanrong | 2012 | Journal of Alloys and Compounds2012，538，： | 1 |
| 5 | Thermodynamics and Kinetics of in-situ Formation of TiAl_3/7075 Composites显示文摘The thermodynamics and kinetics of the reaction between Titanium powder and 7075 aluminum alloy were investigated to assess the possibility of preparing TiAl3/7075 composites by in-situ synthesis method. Results show that Ti and Al melt can form TiAl3 spontaneously, which is considered as a reinforced phase of the matrix. Measurements such as XRD, SEM, and EDX were performed to characterize the as-synthesized samples, and results confirmed the formation of TiAl3 in aluminum matrix composites. The reactive kinetics was controlled by three main factors, which are the system temperature, particle size of Ti, and the thickness of external diffusion layer. | 闫洪 AI Fanrong CHEN Xiaohui | 2013 | Journal of Wuhan University of Technology(Materials Science)2013，28，3： | 0 |
| 6 | Fluorescent bovine serum albumin-silver nanoclusters loaded with paclitaxel can traverse the blood-brain barrier to inhibit the migration of glioma显示文摘Objective::Glioma is the most common and aggressive primary brain tumor. Here, we aimed to establish a nano-drug carrier system to traverse the blood-brain barrier for the treatment and inhibition of glioma migration.Methods::The synthesis of bovine serum albumin protected-silver nanoclusters (BSA-AgNCs) was performed using chemical reduction. The drug paclitaxel (PTX) can be loaded into BSA-AgNCs through electrostatic and hydrophobic interactions to formulate spherical BSA-AgNC-PTX nanoparticles (BSA-AgNC-PTX NPs). A glioma mouse model was established by injecting U251-GFP-Luc cells into the mouse striatum, and all surgical procedures were approved by the Animal Ethics Committee of Nanchang University (SYXK2019-0003) on December 29, 2019.Results::The BSA-AgNC-PTX NPs were able to efficiently pass through the blood-brain barrier, both in vitro and in vivo, to deliver the drug to the tumor site. The in vivo assessment of BSA-AgNC-PTX NPs in glioblastoma multiforme-bearing mice revealed the significant inhibition of tumor growth and migration, prolonging the survival of the mice.Conclusion::These results indicated that BSA-AgNCs might represent an ideal nanocarrier for the treatment of glioma and has the potential to be used in the treatment of a variety of central nervous system diseases. | Yu Liu Yu Liu Yini Zhang Weichang Xie Yalan Yang Kaigeng Hu Hongbo Xin Ping Hu Fanrong Ai | 2020 | Journal of Bio-X Research2020，3，4： | 0 |
| 7 | Intrinsically 89Zr-Labeled Gd2O2S:Eu Nanoprobes for in vivo PET And Γ-Ray-Induced Radioluminescence Imaging显示文摘Cerenkov luminescence imaging(CLI)is a non-invasive imaging technique showing immense promise for clinical translation.However,weak signal intensity and poor tissue penetration depth are two shortcomings that limit its clinical applications. | Ai Fanrong Zhan Yonghua Weibo Cai | 2016 | 功能材料信息2016，13，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员