Search results

Boron and tungsten carbides with high hardness are one of the most demanded materials in surface hardening technologies.
In the latter process, when the surface layer is heated by a laser or an electron beam, the base material is heated above the melting point, and the alloying materials are processed below their melting temperatures.
As a result, alloying materials are dispersed in the form of particles in the molten bath (Fig. 1) [3].
Materials & Methods A Nanosecond Pulsed Ytterbium Fiber Laser (pulsed Yb: fiber laser) YLP-V2-1-100-100-100 was used during the study.
Journal of Physics: Conference Series, (2021) J.

Whether such leak occurs it depends on a line of factors which must be considered during processing of waste materials in building materials and, among others, also when specific technology is selected.
Using the selected input raw materials solidification formulas were then designed.
[4] MALVIYA, R.; CHAUDHARY, R.: Factors affecting hazardous waste solidification/stabilization: A review, Journal of Hazardous Materials 137. 2006, pp.267-276
Kirk Heavy metal speciation and leaching behaviours in cement based solidified/stabilized waste materials, Journal of Hazardous Materials A 82; (2001), pp. 215–230
University of Greenwich: Environmetal Science.

Introduction Recently, semiconductor materials have attracted increasing attention in applications of water or air purification as friendly environmental photocatalyst [1–3].
Among the semiconductors employed, ZnO is one of most effective photocatalytic materials owing to their lower toxicity, inexpensive, excellent physical/chemical stability and high photocatalytic activity similar to TiO2 [4].
Analytical grade ZnSO4•7H2O and Na2CO3 were used as the main materials for the synthesis of ZnO photocatalyst.In a typical procedure, 100 ml of 0.2 mol/L Na2CO3 was dripped into 100 ml of 0.2 mol/L ZnSO4•7H2O aqueous solution under magnetic stirring at 80°C.
Acknowledgements This work was supported by Science & Technology Foundation of Liaoning of China (201102111), Program for Liaoning Excellent Talents in University (LGQ-2011-054, LR2011011) References [1] E.R.
Journal of Wuhan University of Technology.

China 2State Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, P.R.
Sano: Journal of Materials Processing Technology, Vol. 139 (2003) p. 362-367 [3] G.P.
Padalko: Diamond & Related Materials, Vol. 17 (2008) p. 213-216 [4] K.
Yun: Diamond and Related Materials, Vol. 9 (2000) p. 1722-1725 [7] S.
Carlisle: Diamond & Related Materials, Vol. 14 (2005) p. 86-92 [9] K.

However, the pore structure of the mesoporous titania may be damaged seriously by calcination [6,7] and the application of mesoporous titania materials would be restricted.
The goal is to provide new and efficient routes for obtaining crystalline and well structured mesoporous titania materials for potential use. 2.
The TiO2 materials without P123 have smaller surface area though the isotherms(curve a) are also of type IV, whereas, the materials exhibit the smaller surface area of 114.1 m2⋅g −1 only, suggesting the presence of P123 can accelerate the growth of pore structure.
Wang, Journal of Physics and Chemistry of Solids. 69 (2008) 1147-1151 [3] E.L.
Pizzio, Materials.

Experiment Materials.
Compressive loading causes damage to the crystalline matrix of the material, which emits AE events.
Differences in the quantity and size of microcracks that formed during ageing of selected composites were also reflected in the acoustic activity of selected materials during loading.
Acknowledgement This paper has been written as a part of project No. 17-14302S “Experimental analysis of the early-age volume changes in cement-based composites“, supported by the GAČR - Czech Science Foundation and project No.
Puertas, Effectiveness of Mixing Time on Hardened Properties of Waterglass-Activated Slag Pastes and Mortars, ACI Materials Journal, 108 (2011), 73–78

Wind tunnel test of honeycomb in Improving Flow Quality Chunguang Li1, a, Yang Liu 2, b and John.C.K.Cheung2,c 1School of Civil Engineering and Architecture, Changsha University of Science & Technology, China 2School of Civil Engineering and Architecture, Changsha University of Science & Technology, China 3College of Science and Engineering, City University of HK, China amrlcg@126.com, b13973198842@vip.163.com, ccheung.jck@gmail.com Keywords: wind tunnel, flow quality, honeycombs Abstract.
As the performance of the square cells are also influenced by the thickness of the material used for it, considering the material used for the square cells was 3mm plywood, the ideal L/D ratio will decrease if thinner material were used for the fabrication of the square cells.
Acknowledgements This work was financially supported by the National natural science foundation of china (Grant No: 51208067), and opening topic fund subsidization of Hunan Province Research Center for Safety Control Technology and Equipment of Bridge Engineering(Changsha University of Science & Technology ( 12KC02 ), Innovation Program of Hunan Education Commission.
[3] Lumley, J.L (1964), Journal of Basic Engineering, Trans.

Under the assumption of small displacement theory and linear elastic isotropic and homogeneous material behavior, the equation of motion of the body is (1) The displacement and velocity satisfy the initial conditions （2） The singular integral equation can be obtained by travelling characters of elastic wave and dynamic extension of Betti’s reciprocal theorem[1] (3) Where tj(q,t) and uj(q,t) are the stress and displacement, respectively, q∈S. t is time variable.
REFERENCES [1] P.K.Banerjee and R.Buttertield：Boundary Element Methods in Engineering science, McGraw –Hill.
[4]Xuejun.Zhao, Dynamiccrack starting Research Progress,, [J] Building Science, china, 2009, 7, p85-88 [5]Youlin.Liu, ,Dynamic response of the beam structure With a Crack, [J] Journal of sunyatsen university, china, 2012,10,p52-55

Fe2O3-Al2O3 nanocomposite that combine ferrites and dielectrics to form a crystal structure can be used as an EM absorbing material since pure electric or magnetic materials are insufficient radiation energy absorbers [10].
Among the candidates for EM wave absorbing materials, the focus has recently fall onto soft magnets owing to their high saturation magnetization and magnetic anisotropy.
Soft ferrite materials as EM wave absorbing materials have been widely studied from megahertz (MHz) to GHz due to their strong magnetism and high electric resistivity [11, 12].
Laughlin, Amorphous and Nanocrystalline Materials for Applications as Soft Magnets Prog.
Journal of Petroleum Technology 24 (1972)1315–1319

In recent years, a series of Co-based amorphous or nanocrystalline alloys, such as CoSi, have been studied as better materials for hydrogen storage [5, 6].
Acknowledgements This work was financially supported by the Natural Science Foundation of Jiangxi Province (20122BAB216018), and the Scientific Research Foundation of Jiangxi Provincial Education Department (GJJ11221).
Wang, International journal of hydrogen energy. 35, 1669 (2010) [7] J.H.
Zhang, Advanced Materials Research, 284-286, 1546 (2011) [8] H.H.
Zhang, Journal of Northeastern University, 33, 212 (2012) [9] B.