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It is evident that the silicon etching process occurs under the catalyst material only, as can be seen in Fig.1.
Li, Current Opinion in Solid State and Materials Science 16 (2012) 71
Patriarche, Materials Science and Engineering 6 (2009) 012015
Mazzoldi, Journal of Non-Crystalline Solids 194 (1996) 225.

Influence of Alloying Elements Zr, Nb and Mo on the Microstructure and Magnetic Properties of Sintered Pr-Fe-Co-B Based Permanent Magnets Silva, M.R.M. 1a*, Fim, R.G.T.1, Silva, S.C.1, Casini, J.C.S.2, Wendhausen, P.A.P.3, Takiishi, H.1 1Nuclear and Energy Research Institute, Materials Science and Technology Center – São Paulo, Brazil 2Federal Institute of Education, Science and Technology of Rondônia – Rondônia, Brazil 3Federal University of Santa Catarina – Santa Catarina, Brazil a*melissa.rohrig@hotmail.com Keywords: Rare-earth permanent magnets; Pr-Fe-Co-B based magnets; hydrogen decrepitation.
The increasing demand for clean energy, allied to Chinese restrictions to rare earth exportation and high prices, boosted the research in this class of materials [2, 3, 4].
Hydrogen (H2) was introduced with pressure of 2,000 mBar, which was absorbed by the alloy, forming hydrides and making the material friable, facilitating the obtainment of fine powders.
Liu: Journal of Physics D Applied Physics Vol. 46 (2013), p. 23

Introduction Barium cerate (BaCeO3) is a ceramic material with perovskite structure.
There are many possibilities of its using, for example as solid electrolytes in solid oxide fuel cells [3] or as a functional material for semiconductor gas sensors [4].
As a standard reference material was used LaB6 from NIST.
Zmorayová, Microstructure of YBCO bulk superconductors with CeO2 addition, Materials Science and Engineering B 151 (2008) 7-10
Piovarči, Influence of Y2O3 and CeO2 additions on growth of YBCO bulk superconductors, Journal of Crystal Growth 356 (2012) 75-80

With the development of new materials and 900 MPa grade high strength steel widely used, effectively and quickly advanced lightweight boom, boom length for expansion has played an important role in promoting.
The remaining section of arm ranges 0 ° ~ 270 ° in between the body can turn cloth material for 360 ° rotation rod; C.
Material Properties Material for the Q690： Elastic modulus ；Poisson coefficient ratio ；Density Tab.4-1 Natural frequency for 10 steps mode shape diagram Nature frequencies(Hz) 1 0.58551 2 0.79748 3 2.0924 4 2.5973 5 4.2967 6 4.9169 7 6.611 8 8.2617 9 12.871 10 13.991 Ｃ.
[J ] building survey mechanization,2004,(3)pp9-10 [2] Xiao yongqing .. concrete-pump car: Technology decides whether machine ，2009，（8）pp66-68 [3] Cao shuqian ,zhang wende,xiao longxiang .Vibrating structure,modal analysis, the theory and application . tianjing: tianjing university press 2001.pp102-138 [4] Li debao lu qiuhai Experimental analysis and application modal beijing : science press ,2001.pp68-189 [5] Ramji K., Goel V.K., Rao S.A.S.O., et al.
Journal of the Institution of Engineers (India):Mechanical Engineering Division, 2007, 87(1):pp 7-17

For example: bottom residue can be used as embankment fill, road base materials, asphalt concrete pavement filler and cement concrete pavement admixture;ESP fly ash is a good admixture for construction of dam and highways.
The building blocks, produced of lightweight fly ash, with characteristics of insulation, heat insulation and sound-absorbing is a good building materials.
The thermal efficiency of the boiler measures including the high fever boiler economizer and the transformation in the lower temperature and the new material to the boiler insulation have to reduce the loss of two parts.
Acknowledgment This work was financially supported by the China National Coal Association Science Foundation (MTKJ-2010-342), the support of a research grant from the scientific and technological development plan project of Qingdao Municipal (KZJ-50).
Coal-fired power plants water-saving technology [J].Journal of power systems engineering, 2010, 26:69-70 [3]Yuan Yong-tao.

Introduction As materials science and engineering progress, attaining a top-quality welded structure is expected greatly.
Experimental material and methods The base metal selected 6061 aluminum alloy plate which size is 300 mm×300 mm×15mm and welding wire selected ER5356 which diameter is 1.2mm.
Acknowledgment The authors gratefully acknowledge support for this study from the National Natural Science Foundation of China (No.50975286; No.50735006) and Foundation (No.9140A27040310OC8501; No.9140C85020210OC8505).
References [1] GUO Xu-ming, YANG Cheng-gang: Journal of Aeronautical Materials, Vol. 27 (2007), p.18

The materials in this state can be treated as gap medium.
When reaching a certain degree of compaction, it can suppose that the total volume of materials is approximate constant.
Fig. 4 Data of vibratory roller experiment Summary This work is financed by National Natural Science Foundation of China #50975044 and #50875175.
Vibration Utilization Engineering[M], Beijing: Science Press, 2005, 1-7 [2] Bai Feiping.
Investigation of characteristics of one kind of nonlinear dynamics of a vibratory roller[J], Journal of Fuzhou University, 2000, 10，64-67 [5] GUILLO E, GAUTIER M.

Experimental Studies On Enriching Vanadium From Vanadium Tailings Carbon—Containing Pellets By EAF Melting Enhui Wu1,2,a, Shaoli Yang1,2,b,Ping Huang1,2,c,Jing Hou1,2,d 1Panzhihua university, panzhihua, Sichuan,China, 617000 2SiChuan Engineering Research Center for Vanadium & Titanium material, Panzhihua, Sichuan, China ,617000 awuenhui1026@126.com, byangslsl@163.com, chuangping1969@163.com,dhoujing1108@163.com Keywords: Vandium Tailings; Carbon-Containing Pellets;vanadium;EAF Abstract.
This vanadium tailings carbon—containing pellets by EAF melting technique is demonstrated to be effective to enriching vanadium from vanadium tailings for the first time. 2 Experimental 2.1 Materials In this experiment, the chemical composition is given in Table 1, the granularity is given in Table 2.The total iron content was approximately 32.80% and theV2O5 content was 2.08%.
Gansu Science And Technology Crossbar,2006,35(5):38(In chinese)
[3] Du Hegui.The Principle of Blast Furnace Smelting Vanadium titanium Magnetite[M].Science Press,1996(In chinese)
[7] H.F.Yang,L.L.Jing,B.G.Zhang.Recovery of iron from vanadium tailings with coal-based direct reduction followed by magnetic separation,J.Journal of Hazardous Materials.185(2011) 1405～1411.

Rheological Modeling of 7075 Aluminum Alloy Semi-Solid Slurry and its Application in the Simulation of SEED Rheocasting Process Hongxing LU1,a*, Xiaoxia MENG1,b, Nov Bunnareaksathya1,c and Qiang ZHU1,d* 1Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China aluhx@sustech.edu.cn, bmengxx@mail.sustech.edu.cn, c11910224@mail.sustech.edu.cn, dzhuq@sustech.edu.cn Keywords: rheological modeling, simulation, semi-solid slurry, 7075 aluminum alloy Abstract.
The raw material was rheocasted by using SEED method.
Acknowledgement The authors would like to thank the financial support from National Natural Science Foundation of China (grant number 52250710160), Guangdong Basic and Applied Basic Research Foundation (grant number 2023A1515012407) and Shenzhen Science and Technology Innovation Commission (grant number KQTD20170328154443162).
Atkinson, Modelling the semisolid processing of metallic alloys, Progress in Materials Science. 50(3) (2005) 341-412
Zhang, Pressure-driven mold filling model of aluminum alloy melt/semi-solid slurry based on rheological behavior, Journal of Materials Science & Technology. 39 (2020) 14-21

Materials and methods Plant material and low temperature treatment: Seedlings of hybrid Pennisetum were provided by Prof.
Yun-Wei Zhang (Research Center of Grassland Science of China Agricultural University) and Prof.
Biofuels and biomass‐to‐liquid fuels in the biorefinery: Catalytic conversion of lignocellulosic biomass using porous materials.Angewandte Chemie International Edition. 47(48), 9200-9211. (2008) [6] K.K.
Ceylon Veterinary Journal. 21: 52-61. (1973) [7] C.J.
Chinese Journal of Plant Ecology. 36 (6): 572-577. (2012) (in Chinese) [9] H.A.