Advances in Materials

Volume 8, Issue 4, December 2019

  • Effect of Nitrogen Ion Implantation on the Surface Hardness, Corrosion Rate, and Crystal Structure of Pure Aluminium

    Dwi Priyantoro, Emy Mulyani, Tjipto Sujitno

    Issue: Volume 8, Issue 4, December 2019
    Pages: 137-141
    Received: Jul. 22, 2019
    Accepted: Sep. 16, 2019
    Published: Oct. 09, 2019
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    Abstract: The weakness of aluminium and its alloys are relative low hardness and wear resistance. To improve this weakness a nitrogen ion implantation technique has been carried out. For the purpose, an ion implantation process was carried out for various of dose such as 0.578×1016 ion/cm2, 0.706×1016 ion/cm2, 0.842×1016 ion/cm2, 0.970×1016 ion/cm2, and 1.10... Show More
  • Environmentally Benign All-inorganic Perovskite Solar Cells

    Liqiu Zheng, Robert S. Owor, Zhongrui Li

    Issue: Volume 8, Issue 4, December 2019
    Pages: 142-155
    Received: Sep. 19, 2019
    Accepted: Sep. 29, 2019
    Published: Oct. 14, 2019
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    Abstract: Organic/inorganic hybrid lead halide perovskite solar cells have recently emerged as the forerunner in the next generation of photovoltaic technology due to unprecedented progress in power conversion efficiency from their debut of 3.8% in 2009 to the currently certified 23.3%. Mixed PSC solar cells are subject to compositional degradation when expo... Show More
  • Results of Theoretical and Experimental Researches of Anomalous Low Friction and Wear in Tribosystems

    Viacheslav Stadnychenko, Valeriy Varvarov

    Issue: Volume 8, Issue 4, December 2019
    Pages: 156-165
    Received: Aug. 30, 2019
    Accepted: Oct. 07, 2019
    Published: Oct. 25, 2019
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    Abstract: The paper presents results of theoretical and experimental researches of anomalously low friction from the standpoint of thermodynamics of non-equilibrium processes occurring under conditions of elastic interaction of microrelief of tribosystem elements. The search of theoretical prerequisites for the transfer of external friction from the "normal ... Show More
  • A Hybrid Q-switched Yb3+s-doped All-fiber Laser Based on the Acousto-optic Q-switch and SBS Effect

    Lianju Shang, Hui Xu, Zhenzhong Cao, Mingsheng Niu

    Issue: Volume 8, Issue 4, December 2019
    Pages: 166-169
    Received: Sep. 30, 2019
    Accepted: Oct. 18, 2019
    Published: Oct. 25, 2019
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    Abstract: In the past 30 years, the studies on Q-switched fiber lasers have made great progress in both theoretical and experimental fields. So far there have been many reports about the acousto-optic active Q-switched fiber lasers. At the same time, there are many reports about the passive Q-switched pulse output using SBS effect in optical fibers, and this... Show More
  • Analysis of Active Mechanism of Chemical Activated Strontium Slag

    Hongzhou Zhu, Li Ou, Daqian Wang, Lanxin Hu, Erhu Yan

    Issue: Volume 8, Issue 4, December 2019
    Pages: 170-175
    Received: Oct. 16, 2019
    Accepted: Nov. 06, 2019
    Published: Nov. 21, 2019
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    Abstract: In order to improve the activity of strontium slag, the mixed cementitious material of strontium slag cement was prepared by adding 30% (mass fraction) of pulverized strontium slag into cement. Chemical activators such as Na2SiO4, NaOH, CaCl2, NaCl, Ca(OH)2, Na2SO4 were added to the cementitious material. The flexural and compressive strength value... Show More
  • Gas Ingress and Egress of MEMS Multi-Chip Modules and MEMS Devices

    Lu Fang, Lyle Alexander Menk

    Issue: Volume 8, Issue 4, December 2019
    Pages: 176-182
    Received: Nov. 12, 2019
    Accepted: Dec. 05, 2019
    Published: Dec. 13, 2019
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    Abstract: Hermetic microcircuit packaging was the dominant method of protecting semiconductor devices in the 1960s and 1970s. After losing majority market sectors to plastic encapsulated microelectronics over the last a few decades, hermetic packaging remains the preferred method of protecting semiconductor devices for critical applications such as in milita... Show More