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Reduction of Molybdenum Trioxide by Using Hydrogen Mohd Nor LATIF1,a, Alinda SAMSURI2,3,b, Mohammad Wahab MOHAMMAD HISHAM2,c, and Mohd Ambar YARMO2,d 1PERMATApintar National Gifted Centre, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia 2School of Chemical Science & Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia 3Department of Chemistry, Centre for Defence Foundation Studies, Universiti Pertahanan Nasional Malaysia, Kem Sungai Besi, 57000 Kuala Lumpur, Malaysia amohdnor@ukm.edu.my, balindasamsuri@gmail, chisham5011@gmail.com and dambar@ukm.edu.my Keywords: Molybdenum trioxide, Molybdenum, Reduction, Hydrogen Abstract.
Materials and Methods Materials.
Starting materials was commercial molybdenum trioxide (MoO3) powders supplied by Sigma-Aldrich.
Journal of Refractory Metals and Hard Materials, 54 (2016) 342–350

A thermodynamic approach is necessary in order to predict and understand physico-chemical phenomena occurring in nuclear materials under irradiation, involving large chemical systems with a lot of elements including both initial nuclides and fission products (FP).
This approach can be used to predict the behaviour of complex nuclear materials, especially for the different kind of fuel materials considered in the frame of Gas Fast Reactors.
Miodownik: CALPHAD - Calculation of Phase Diagrams, A Comprehensive Guide (Pergamon Press, Elsiever Science Ltd, North Holland 1998)
Konings: Thermochemical Data for Reactor Materials and Fission Products (Elsevier Science Publishers B.V., 1990)
Konings: Journal of Phase Equilibria, Vol. 14, n° 4 (1993)

Rovisco Pais, 1049-001 Lisboa, Portugal 2 Department of Materials Science and Engineering, Zhejiang University, 310027 Hangzhou, China Keywords: Alkaline fuel cell, hydrogen storage alloys, electrode properties Abstract.
It was suggested that hydrogen storage intermetallic compounds could be used as electrocatalysts to substitute noble metal for fuel cell anode materials [1,2].
TiFe and TiFe-based alloys are considered as appropriate materials for hydrogen storage application because of their high energy density, good hydrogen absorption-desorption capability, low price and environmental compatibility [3,4].
Acknowledgements This work is supported by the Portguese Science & Technology Foundation (FCT). 5.
Perng, International Journal of Hydrogen Energy, 9 (1994) pp.259 [5] C.

The pouring time (tpouring) was 7 seconds, the shell thickness () was 7.1~7.3 mm, and the ceramic shell material was Zircon sand (Zr sand).
Properties of S45C materials.
Acknowledgements The authors gratefully acknowledge the support provided for this research by the Ministry of Science and Technology of the Republic of China under grants MOST 103-2622-E-020 -004 -CC3.
Thesis, Department of Metallurgical and Materials Engineering, University of Pittsburgh (1981) [3] R.
Stoehr, “Fluid flow modeling for computer aided design of casting”, Journal of Metals, p 22-29 (1983)

Fuchs, Materials Science and Engineering A, 381(2004) 143–153
Hu, Materials Science and Engineering A, 527(2010) 890–897
Yue, Journal of Material Science, 43(2008)5878–5883
XU, Z.Q Hu, Materials Science and Engineering A, 279(2000)160–165
Su, Materials Science and Engineering A, 594 (2014) 7–16

This work by stress concentration as the starting point, on the basis of the principle of stress-magnetic effect, the use of external stress caused by stress concentration will lead to the law of the change of the magnetic properties of ferromagnetic materials, to attribute assignment of ferromagnetic materials and simulate the coupling field of stress-magnetic effect on the 20# steel specimen.
Stress produce strain, the strain caused by atomic slip of ferromagnetic materials, magnetic domain wall movement, grain boundary migration, structural transformation and so on, lead to the change of permeability at last.
Specimen appears grains dislocation slip, showing macroscopic plastic deformation of materials, plastic deformation hardening material, it is the result of a metal crystal dislocations and dislocation interactions.
Acknowledgements In this paper, the research was sponsored by the Nature Science Foundation of China (Project No. 51261023).
References [1] Aviation industry science and technology commission, The stress concentration factor Handbook, Higher Education Press, Beijing, 1990

Therefore, stresses of solidification and solid-state shrinkage become larger to be borne by the material, which has low volume fraction of liquid near the solidus line, the net results is that the strain which the stresses impart cannot be sustained by the material, within the elastic limit, or the displacement is so large in the plastic region that the crack initation and propagation can occur readily.
These thermal and mechanical systems of equations are solved simultaneously using the Newton's method. 2.2 Thermal model Due to the time-dependent nature of the casting process, the heat transfer model of the DC casting process must be transient and must account for any appreciable temperature dependencies in thermo-physical properties of the materials employed in the casting process.
The stress model uses an elastic rate-dependent plastic material constitutive behavior for 7B50. ② The extent to which the sump depth is influenced by the casting speed is evident, the faster the casting speed, the deeper is the sump.
References [1] J.Sengupta, PhD.thesis, Department of materials engineering, University of British Columbia, Vancouver, Canada, 2002 [2] Christopher J.Vreeman, Matthew John M.Krane, Frank P.Incropera, The effect of free-floating dendrites and convection on macrosegregation in direct chill cast aluminum alloys, Part I: model development, International Journal of Heat and Mass Transfer, 2000, 43: 677-686 [3] Xianshu Zheng, Yicheng Wang, Zhaoxia Li, Junze Jin, Numerical simulation of the temperature field in the electromagnetic semi-continuous casting of slab, Science and Technology of Advanced Materials, 2001,2: 109-111 [4] Fic A, Nowak A J, Bialecki R, Heat transfer analysis of the continuous casting process by the front tracking BEM, Eng Anal Boundary Elements, 2000, 24: 215-223 [5] Šarler B, Mencinger J, Solution of temperature field in DC cast aluminum alloy billet by the dual reciprocity boundary element method, Int J Numer Methods Heat
B.Šarler, Solution of transient direct-chill aluminum billet casting problem with simultaneous material and interphase moving boundaries by a meshless method, Engineering Analysis with Boundary Elements, 2006, 30: 847-855 [11] J.Sengupta, S.L.Cockcroft, D.Maijer, M.A.Wells, A.Larouche, The effect of water ejection and water incursion on the evolution of thermal field during the start-up phase of the direct chill casting process, Journal of Light Metals, 2002, 2: 137-148 [12] J.Sengupta, S.L.Cockcroft, D.M.Maijer, A.Larouche, Quantification of temperature, stress, and strain fields during the start-up phase of direct chill casting process by using a 3D fully coupled thermal and stress model for AA5182 ingots, Materials Science and Engineering A , 2005, 397: 157-177

However, when the dimensions of nano materials are comparable to their atomic or molecular scale, physical phenomena like fluid flow or heat transfer tends to become discrete and traditional continuum models are not valid.
Further, the dielectric thickness of low-k materials for Cu wires is also higher when compared to the wire spacing that we had taken for CNT/AG wires.
Maex, Low-k dielectric materials, Materials Today, 7, (2004) 34-39
He, on fractal space-time and fractional calculus, Thermal Science, 20, (2016), 773
Raj, Influence of temperature on MWCNT bundle, SWCNT bundle and copper interconnects for nanoscaled technology nodes, J. of Materials Science: Materials in Electronics, 26, (2015) 6134-6142

While, all of these evaluating indicators should be kept in the reference range for used materials.
The material utilized is illustrated in table 1[9].
Model C also adapts from model A, in which only the skin material is changed into carbon fibers, and the other part keeps the same.
Therefore, more attention should be paid to the blade root structure design, especially for this glass/carbon hybird fibler material.
Acknowledgement The authors are thankful to the support of national natural science foundation of China (the Grant No. 50675067 and 50975090) and natural science foundation of Guangdong Province (the Grant No. 05006496).

Ferreira: Materials Research Vol. 19 (2016), p.520
Castro: Materials Research Vol. 18 (2015), p. 489
Wang: Corrosion Science Vol. 53 (2011), p. 3756
Sasaki: Advanced Materials Research Vols. 476-478 (2012), p. 642
Castro: Materials Research Vol. 14 (2011), p. 73.