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This material contains a lot of valuable components such as REE and niobium (mas., %: 12,8 ΣREO (rare earth oxides), 0.039 Sc, 18.4 P2O5, 9.9 Fe, 9.0 Al, 0.24 ThO2, 8.2 Nb2O5).
These products are raw materials to extract target components.
It is necessary to find a more effective acid decomposition process of this raw material.
African Journal of Science, Technology, Innovation and Development, 6 (2017) 1-8
RUDN Journal of Engineering Researches, 19 (2018) 92-101

Application of Electron Probe Microanalyzer (EPMA) to Depositional Environment Identification of Sedimentary Rock Qingkun He1, a, Changying Shi2, b 1College of Materials science and engineering, Shandong university of science and technology, Qingdao 266590, China 2Key Laboratory of Depositional Mineralization & Sedimentary Mineral (SDUST), Shandong Province, Qingdao, Shandong 266510, China) aqingkunhe@163.com, bdizhishichangying@163.com Keywords: EPMA , depositional, identification, sedimentary rock Abstracts: Electron microprobe technology is widely used to component analysis of metals, minerals and geology.
Introduction Electron probe microanalyzer(EPMA), a common instrument to study the elements of material surface, can scan anywhere of material surface and analyze the material elements easily by the analysis of X-ray which can be induced when the electron beam hit the surface of materials.
Popular science press, 1984
Journal of China University of Mining [10] Rennong Wang.
Chinese Journal of Geology, 1977, 4 [11] Yangyong, Nengsong Chen.

Adhesion and Corrosion Resistance Properties of TiC/Ti(CN)/TiN Multilayer CVD Coatings on 42CrMo Steels Zhang Jin a ,Xue Qib ,Cheng Xiaoweic ,Zhang Chunmeid ,Li Songxia e school of Materials Science & Engineering, Southwest Petroleum University Chengdu 610500 P.R.China a jzhang@swpu.edu.cn, b qxue01@163.com, ccxw0261@sina.com, d zcm_331@163.com, e lisongxiay@163.com Keywords:TiC/Ti(CN)/TiN multilayer coatings;CVD;corrosion behavior;adhesion Abstract.
There are in general two ways of improving the corrosion resistance of the steels.One way is to use Ni,Cr alloy etc,having better corrosion resistance to supplanted classes of engineering materials.However, the high cost of the mental prohibits its widespread use[1] .The other is to enhance the surface properties of the steels.Most steel failures due to corrosion are known to be initiated at the surface.The advantage to the coatings is that the substrate can be optimized for properties.Different types of coatings have found different engineering application.Ti based hard coatings(TiN,TiC,Ti(CN)) obtained by chemical vapor deposition(CVD) are attractive materials due to its high hardness,good wear resistance,chemical stability [2] .
Experiment Substrate Material.
Acknowledgements The authors want to thank The National High Technology Research and Development Program of China(863 program)(No.2007AA09Z202),and The Natural Science Foundation of SWPU(2007XJZ030) for financial supports to the work.
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Hanyuan Erman mountain highway landslide start stage of pore water pressure effect analysis [J].Journal of engineering geology, 2013, 21 (1): 70-75.
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Study on determination of I-V curve of dye-sensitized solar cell Hanmin Tian1,2, a, Tao Yu1,b* and Zhigang Zou1 1 Eco-materials and Renewable Energy Research Center (ERERC), Department of Physics, Nanjing University, Nanjing 210093, China; 2 Department of Electronic Science and Technology,School of Information, Hebei University of Technology, Tianjin 300401, China; atianhanmin@hebut.edu.cn, byutao@nju.edu.cn* Key words: Dye-sensitized solar cell; Equivalent circuit; EIS; Internal resistance Abstract.
In order to accurately evaluate the materials, structures and manufacture of DSSC, an exact measurement method on DSSCs’ photovoltaic character is necessary.
It was reported the traditional monochromatic incident photon-to-electron conversion efficiency (IPCE) measurement method in previous studies, such as the American Society for Testing and Materials standard (ASTM), is not suitable for measuring the IPCE of dye-sensitized solar cells (DSSCs) [3].
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Nara, JAPAN: Elsevier Science Sa

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The Cold Rolling Effect on the Precipitation Sequence and Microstructural Changes of an Al-Mg-Si Alloy Hichem FARH1,2,a,*, Toufik ZIAR1,2,b, Hanna BELGHIT1,2,c, Mourad KHECHBA1,d, Abdelouahab NOUA2,e, Fares SERRADJ3,f 1Department of Material Sciences, Faculty of Exact Sciences, University of Tebessa 12002, Algeria 2Laboratoire des Composants actif et Matériaux, Oum el Bouaghi, Algeria. 3Department of Material Sciences, Faculty of Exact Sciences, University of Guelma.
This operation can influence on the mechanical and microstructural properties of the deformed materials The Al-Mg-Si aluminum alloys are largely used in automotive industry and in the applications in aerospace due to excellent corrosion resistance, high strength and good formability, [1-3].
Gavgali, The effect of homogenisation treatment on cold deformations of AA 2014 and AA 6063 alloys, Journal of Materials Processing Technology, 147(1) (2004) 60-64
Leo, Influence of severe plastic deformation on aging of Al–Mg–Si alloys, Materials Science and Engineering A, 410–411 (2005) 226–229 [25] H.
Kaneko, Effects of scandium and zirconium addition on recrystallization behavior of AlMgSi alloy, Materials Transactions, 59 (4) (2018) 590-597

That is to say that the toughness of the materials gradually decreases with the increase of age.
(2) Tensile performance of SHCC is affected by sand grades when the other materials are same.
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