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For the objective of designing the electric machines, transformers, and inductors, loss in the magnetic material is often predicted using a power law equation [1] W= k fα Bβ (1) where B is the peak flux amplitude, W is the time-average power loss per unit volume, and f is the frequency of sinusoidal excitation, and k, α, and β are constants found by curve fitting.
Acknowledgements The authors would like to thank the National Science Council of the Taiwan, Republic of China, for financially supporting this research under Project No.
De Doncker, “Calculation of losses in ferro- and ferrimagnetic materials based on the modified Steinmetz equation”, in Proceedings of 34th Annual Meeting of the IEEE Industry Applications Society, vol.3, pp. 2087–92, 1999
[3] “Test Method for Alternating Current Magnetic Properties of Materials Using the Wattmeter- Ammeter-Voltmeter Method, 100 to 10 000 Hz and 25-cm Epstein Frame,” Annual Book of ASTM Standards A0348_A0348M, Vol. 304, pp. 35–48, 2003 [4] Wen-Chang Tsai, “Effects of Core Materials and Operating Parameters on Core Losses in a Brushless DC Motor,” International Journal of Engineering and Industries, Vol.2, No.1, pp.51- 61, March. 15, 2011

The UH-F500KIN material testing machine was used to test the tensile performance of the pipe section parent material (longitudinal) according to GB/T 228.1-2010.
The metallographic analysis of base material and weld has not found abnormal metallographic structure.
Journal of physical and chemical inspection - physical pathol, 2017, (4): 299-301
Transactions of material heat treatment, 2016, 36(3): 45-50
Science and technology economy market, 2015, (8): 151.

Effect of annealing on properties of the TiN & TiAlN coatings deposited on powder metallurgy high speed steel ( S790 ) Chuanliang Caoa, Xianglin Zhang*b, Chunfa Dongc and Xiang Zhad State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China acaoliang1102736@126.com, bhust_zxl@mail.hust.edu.cn, cdongchunfa@126.com, dzhaxiang@csu.edu.cn Keywords: TiN&TiAlN, residual stress, adhesion strength, annealing.
In present study, the annealing temperature is only 500℃ and the TiN and TiAlN coatings are coated on the powder metallurgy high speed steel S790 which is newly developed fine blanking tool’s material.
Kondn: Journal of Solid Mechanics and Materials Engineering, Vol. 1(2007), p. 299
Yang: Electronic Materials Letters, Vol. 4(2008), p. 99

In this paper, the zinc oxide-based AOS material has been prepared by solution method and the effect of heat treatment conditions on their performance has been analyzed.
Therefore, incorporation of these atoms into InZnO material can also reduce the oxygen vacancies.
Table 4 shows the Hall test results of the above two materials.
Although the mobility of the two materials is similar, the carrier concentration of InZnO is greater.
Dey: Journal of Sol-Gel Science and Technology. 1(1994) p.251-265 [5] Information on http://wenku.baidu.com/view/43093cff04al b0717fd5dde2.html

The flexural strength could achieve more than 5.5MPa at 28 days, and the recycled concrete felt with the existent pavement well, which could fulfill the long-term requirements of airfield pavement, the concrete also could be used in the rapid repair the cement concrete pavement of civil airfield and highway. 1 Introduction Cement concrete has excellent construction properties and durability[1], it constitutes the mostly building material of airfield pavement.
At present, the repair materials for the pavement include very quickly setting cement concrete, Portland cement concrete with flash admixture, mineral or organic polymer concrete, and so on, but there are some questions, such as the 4 hours’ strength is lower, the felting performance of repair materials and the existent pavement is not definite, the long-term strength is lower and even minish[2~3].
The tiny aggregates effect could stoppage the bleeding channels in the mortar and prevent the concrete from segregating and bleeding, so the concrete has well capability of water retention[8]. 3 Test studies 3.1 Materials (1)Cement: a, 42.5R portland cement was produced in Yaoxian of Shaanxi, the density is 3.10g/cm3, the flexural strength and compressive strength at 3 days are 6.1MPa and 28MPa, at 28 days are 8.9MPa and 48MPa; b, Type S early strength special cement was produced by Double-crane Special Cement Limited Company of Shanghai, the density is 3.10g/cm3, the initial setting time≤5 minutes, the final setting time≤10 minutes, when W/C=0.35, the compressive strength of neat cement grout at 2 hours is higher than 20MPa, at 1 day is higher than 40MPa; (2)Fly ash: Fly ash of grade Ⅱ was produced by Wei River Power Plant in Shaanxi, the density is 2.20g/cm3, the water requirements ratio is 91%; (3)Fine aggregate: Medium sand from Ba River in Shaanxi, the fineness module is 2.73
Acknowledgements The research documented in this paper was sponsored by the Science and Research Foundation of Logistics Department of Air Force(KH0706014) and the Research and Innovation Foundation of.
Journal of Highway and Transportation Research and Development, 4 (2007) 25-28

The Microstructure and Mechanical Properties of Ti/TiN Multilayer Film Synthesized by Unbalanced Magnetron Sputtering Deposition on 17-4PH Stainless Steel Qi ZHANG 1, Feng QI1 , Yongxiang LENG1, a, Nan HUANG2 and Zhenbing CAI1 1 School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China 2 Key Lab. for Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China a yxleng@263.net Keywords: Multilayer; Titanium; Titanium nitride; Magnetron sputtering; Wear resistance.
Experiment The 17-4PH stainless steel was used as substrate material.
Benavente: Journal of Materials Processing Technology Vol. 145 (2004), P.371-376 [10] Wuu-Ling Pan, Ge-Ping Yu, Jia-Hong Huang: Surf.

The utilization of natural materials provides benefits to the environment in terms of degradability.
They are high specific strength and modulus materials, low priced, recyclable and are easily available.
Materials and Methods Materials.
CCD Camera Lens Stage Fig. 7: Optical microscope equipment Materials and Methods Surface Roughness Test.
Aditiawati, “Asian Journal of Plant Sciences Review Article Review on Quality Enhancement of Bamboo Utilization : Preservation , Modification and Applications.”

The material is Q235 steel, whose yield stress is 235Mpa.
The density of material is 7800 kg/m3. the Young’s modulus is 2.06×1011N/mm2.
Journal of Zhengzhou University: Engineering Science,2008,29(3):99-102

Introduction Magnesium alloys are promising structural light metals because their low densities, good recyclical potential and abundant resources, which are expected to become next-generation materials [1, 2].
Acknowledgements The authors gratefully acknowledge the financial support of this work by the National Natural Science Foundation of China under contracts No. 50735005.
Luan: Journal of Alloys and Compounds Vol.336 (2002), p.88 [3] S.Kleinerl, P.J.Uggowitzer: Mater.

[3] Zener C: Journal of Applied Physics, 1949, 20(10), 950-953
[8] Crespo D, T Pradell, M T ClavagueraMora, N Clavaguera: Physical Review B, 1997, 55(6), 3435-3444 [9] VanderVen A, L Delaey: Progress in Materials Science, 1996, 40(3), 181-264