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Structure and Photoelectric Properties of Cu3N Thin Films by Reactive Magnetron Sputtering Jinfeng Lenga*, Lina Chenb, Xiaozhe Zhuc and Zhenhe Sund Material Science and Engineering, university of Jinan，Jinan, Shandong, 250022, China a*jfleng@126.com, bcln371327@163.com, czhuxz2036@163.com, dsunzhenhe_jn@163.com Keywords: Cu3N thin films, Magnetron sputtering, N2/Ar Ratio, Structure, Photoelectric properties.
And the value of optical reflectance changes greatly before and after decomposition which is critical for write-once optical recording materials.
Acknowledgments The authors thank for the support of the National Natural Science Foundation of China (No. 51301076), Science, Technology project of University in Shandong Province(No.J14LA60), Doctor Foundation of University of Jinan(XBS1107)，and Technology Foundation of University of Jinan(XKY1105).
X-Ray Diffraction Procedures for Polycrystalline and Amorphous Materials: Second edit ion [M].
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The ultrasonic time-of-flight diffraction (TOFD) method The basic principle of the TOFD technique can be depicted in Fig.1 Suppose a buried crack in a specimen of isotropic and homogeneous material is located between a transmitter and a receiver [3].
The material of transducer wedge is Lucite and its angle is 45°, which means the refraction angle in the mild steel is 45°.
Materials Evaluation, Vol.43(1985),p. 1455 [2] Daniele Marioli, Claudio Narduzzi, Carlo Offelli, Dario Petri, Emilio Sardini, Andrea Taroni: IEEE Transactions on Instrumentation and Measurment, Vol.41(1992),p. 93
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I:Journal of Acoustic Society of America, Vol. 113(2003), p.1551.

Parameters Value Materials of the mould core Steel H13 Initial temperature of the mould core 20℃ Materials of the mould frame Steel 45 Initial temperature of the mould frame 20℃ Temperature of heat transfer oil 290℃ Temperature of air 20℃ Time for simulation 8 hours Between the heat transfer oil and the mould core, there exists convection heat transfer.
Studies have shown that the heat transfer coefficient hcontact is mainly affected by factors such as interface temperature, interface pressure, interface roughness, and the types of materials on both sides of the interface [13].
Feng, Principles of Chemical Engineering, Science Press, Beijing, 2001.
Fang, Study on Cooling Channel Arrangement of High -Pressure Casting Die for Box -Like Workpieces, Journal of Xi'an Jiaotong University. 45.07 (2011) 38-44
Ning, Experimental study on thermal contact resistance between solid-solid surface and development on database query system, Nanjing University of Science & Technology. (2014) [14] Y.M.

Such models allowed for the development of many materials that are used in electromagnetism for antennas and dielectrics.
In a similar manner, the mathematical formulation of diffusion by Fick facilitated the development of membranes and diffusion-barrier high performance materials.
Synthetic polymers (plastics) are one such material.
To continue, another mathematical technique used in imaging is the inverse conductivity problem, also known as EIT (Electrical Impedence Tomography), having applications in medical imaging, underground prospection and non-destructive testing of materials.
Journal of Chemical Physics, 21(6):1087-1092, 1953 [6] S.

This issue has been frequently addressed in many journals and conferences sections.
The solution of both problems of fluid flow and metal plastic flow provide fields of velocities, pressure and temperature, and provides important data about materials flow pattern [7,11].
The contours of axial velocity in Fig. 4a display the dead zone of material flow, i.e, region where the axial velocity is very small, showing that the material has almost stopped, while the remaining material is flowing.
Mielnik, Metalworking Science and Engineering.
Thesis (Ph.D) – Department of Mechanical Engineering, Imperial College of Science, Technology and Medicine, London, 1996

Introduction Bamboo fiber is gaining much attention from materials engineer to develop low-cost green composite materials.
Materials and Methods Material.
Anshari, Effects of alkali treatment of bamboo fibre under various conditions on the tensile and flexural properties of bamboo fibre/polystyrene-modified unsaturated polyester composites, Journal of Engineering Science and Technology 14(1) (2019) 026 – 046
Series: Materials Science and Engineering 532 (2019) 012008
[15] ASTM D3039, Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials, ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, 2000

As shaft surface soil depth increases, the materials of shaft lining develops from plain concrete to super reinforced concrete, from single steel plate to double steel plate.
However, the materials cannot bear the pressure.
Design of shaft lining structure model testing In the model testing, we use the original shaft lining materials, which are super strength steel fiber concrete and steel plate applied in actual constructions, which gives complete stress-strain curve of strength similarity and loading.
Since the shaft lining model and prototype keep geometrical similarity before and after the loading deformation and adopt the same materials, and then the above similarity conditions may be rewritten as follows: , (1) Among, is strength similarity Constant.
[5] Lin Xiaosong and Yang GuoLin: High Strength and Super Strength Steel Fiber Concrete (Science Press, Bei Jing 2002)

It included capillary materials, pressure-relief throttle valve, vapor inlet pipes, inner layers, layered reservoirs, outlet pipes, diffuser and outer layers etc.
Capillary material was installed in the layered reservoir.
Adiabatic material, 9.
Acknowledgements This project was financially supported by the Chinese Postdoctoral Science Foundation (2012M521814), The National Innovation Funds for Small and Medium Enterprises (11C26216206230, 13C26216205880) and Gansu Natural Science Foundation (212263).
Rade, “Thermal design and analysis of the Mars exploration Rover surface impact airbags,” Journal of Spacecraft and Rockets, Vol. 44, No. 2, March–April 2007

Corrosion Science, Dept.
Materials Science and Engineering, Royal Institute of Technology Drottning Kristinas väg 51.
Kröger, Journal of the American Ceramic Society, 1973. 56(4)
Macdonald: Impedance Spectroscopy - Emphasizing Solid Materials and Systems. 1987: John Wiley & Sons, Inc
,Ho: Materials research society symposia proceedings Vol. 124 (1988), p. 137

As a promising processing technique of hard and brittle materials, ultrasonic assisted grinding (UAG) can not only enhance the machining efficiency but also improve the surface quality [4].
Once a wheel depth of cut ap is given to the workpiece and a feed motion is provided to the worktable at a rate of Vw with a stroke of S, the grinding wheel rotating at a speed of Vs will interfere with the workpiece to remove the work-materials.
However, it should be noted that in the first two regions the ratio in EUAG is much less than that in CG, indicating that it is easier to remove the work-materials in EUAG than that in CG.
Wu, et al.: Journal of the Japan Society for Abrasive Technology, Vol. 47 (10) (2003), p. 550-555.
Liang, et al.: Materials Science Forum, Vol. 626-627 (2009), p. 35-40.