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Preface 2nd ICETAT This issue collected some engineering, tribology and materials research papers from the International Conference on Engineering Tribology and Applied Technology 2020 (ICETAT2020).
At the same time, the conference represented a unique opportunity for the tribology and engineering community to present their new research results, exchange ideas and become familiar with new trends and directions in the fields of Basic Friction and Wear, Biotribology, Computer-Aided Engineering, Contact Mechanics, Dynamic and Vibration Engineering, Green Tribology and Sustainability, Lubricants and Lubrication, Material Analysis and Examination, Manufacturing Technology, Measurement and Signal Processing Technology, Micro and Nano Tribology, Surface Engineering and Coating, Tribology in Machine Elements, etc.
The papers presented in Journal of Key Engineering Materials are the selected manuscripts associated Engineering, Tribology and Materials research areas from ICETAT2020.
Committee Members Yunn-Lin Hwang Jeng-Haur Horng Chin-Chung Wei Sponsors Ministry Of Science and Technology (MOST) Taiwan Society of Tribology Technology (TSTT) National Formosa University (NFU)

Surface Engineering of Metal Oxide Photoelectrodes for Improved Band Alignment in Solar Water Splitting Cells Soong Leong Sim1, Yeru Liu1, Ying Woan Soon1, 2 and James Robert Jennings1, * 1Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Negara Brunei Darussalam BE1410 2Centre for Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Jalan Tungku Link, Negara Brunei Darussalam BE1410 Keywords: solar water splitting; photoelectrochemistry; surface engineering; TiO2; lithium-ion modification Abstract.
A great deal of research is focused on the identification, design, and evaluation of materials for use as photoelectrodes in PEC cells.
At minimum, candidate materials must possess an optical band gap that is narrow enough to absorb solar radiation, but wide enough to provide sufficient driving force for the oxygen and hydrogen evolving reactions (OER and HER, respectively) [2].
Experimental Section Materials.
Grätzel, Dye-sensitized Solar Cells, Journal of Photochemistry and Photobiology C-Photochemistry Reviews 4 (2003) 145-153

Geopolymer binder has been identified to create good adhesion between these two materials.
The aim of the study is to characterize the shear and pullout resistance of an assembly of three materials (wood/geopolymer binder/earth) to validate the performance of the binder as joint materials.
The goal of this work was to describe and better understanding ofthe mechanical behavior of each materials separately and of the composite masonry material.
Rossignol, A “geopolymer mortar for wood and earth structure”, in press in Journal of construction and building materials, 2012
Rossignol, “Silica fume as porogent agent in geo-materials at low temperature”, Journal of the European Ceramic Society, 30:1641–1648, 2010

These properties express the resistance of materials to elasto-plastic solicitations.
Nano-indentation is a nondestructive test and can be used for bulk or thin materials.
Nevertheless, measured elastic (Young's) modulus of hard materials is higher than that of known materials, i.e. quartz, E (O&P) = 1.7E (Literature).
King, International Journal of Solids Structures Vol. 23 No. 12 (1970), p. 115
Debili, J. of Metastable and Nanocrystalline Materials, Vol. 22 (2004), p. 121

Environmental logistics was paid great attention as the results of the rapid developments of society and economy, and threats of the materials and environment.
Table.1 Evaluation index system of environmental logistics Evaluation index system of Environmental Logistics Environmental and resource property Various types of pollution Raw materials and energy Human resources Economic property Logistics cost of enterprises Supply chain performance Social costs Technical property The level of modernization of logistics management The scientific level of logistics decision system Advanced logistics equipment After building the evaluation index system, the relationship between the indexes were done in the SD software.
ACK�OWLEDGME�T The authors sincerely appreciate the National Soft Science research project: Study on the training model and the growth path of high-skilled talents.
Journal of Wuhan University of Technology.
Journal of Information.

Additive manufacturing in the form of Laser deposition presents us with a very unique way to manufacture near net shape metallic components with advanced materials.
High entropy alloys have been viewed as a future class of high temperature metallic materials.
Li et al. / Journal of Alloys and Compounds 504S (2010) S515–S518
Chou et al. / Materials Science and Engineering B 163 (2009) 184–189
[8] Sheng GUO et al, Progress in Natural Science: Materials International 21(2011) 433-446.

Selecting different couple materials to carry on thermal balance clearance analysis, including metals used in water media.
Under different materials matching, the thermal balance curves were shown in Fig.3.
Therefore, we must pay attention to the thermal expansion and thermal conductivity when choose materials for friction pair.
(a) Matching between PH17-4 piston and different materials cylinder (b) Matching bewteen QAL9-4 cylinder block and different material piston Fig. 3 Influence of different couple materials Other influence factors.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China project (10972086).

Palatkinab Volgograd State Technical University (VSTU) Volgograd, Russia arct2005@yandex.ru, blv.palatkina@yandex.ru Keywords: rolling, deformation, explosion welding, the temperature of the rolling, diffusion, titanium, aluminum, composite material.
Materials and Technique of Experiments The influence of the degree of deformation and holding time during heating on the kinetics of dif-fusion processes of titanium-aluminum compounds in the composite AMg6–AD1–VT1-0 was studied.
Problems of materials science, welding and strength in machine building, 5 (160) 139-142
Welding Journal, 6 (1978) 425
Bondareva, IOP Conference Series: Materials Science and Engineering, 2017.

Many researchers have worked very hard to develop thick laminated composite materials that are safe and more cost-effective by carefully considering factors like the number of layers, the angle of the fibers, the distribution of the laminates, etc.
Computer software (ANSYS) for finite element analysis FEA was used to analyze the composite materials created for the current investigation.
This is because the hardness values of composite materials containing nanomaterials are higher than those of composite materials without nanomaterials.
Composites Science and Technology 2008, 68: 7-8, p. 1664–1670
Journal of Sound and Vibration, 344, 377- 398, 2015

Its material: Lustran ABS 1146, material of cores is: TOOL STEEL P-20.
Fig.4 The curve of viscosity comparison of materials The comparison of core materials Table 2 is the comparison of the properties of core materials in this analysis.
Using core materials with higher stifeness; 2.
Improving the temperature of materials and molds.
References [1] ZhaoDong Li: submitted to Journal of Shandong Institute of Architecture and Engineering (2000)(in Chinese) [2] Yun Li: submitted to Journal of Shaanxi University of Technology (2006) (in Chinese) [3] Guoming Li, in: The issue of the latest version Autodesk Moldflow 2010 in Science and Technology Daily (2009) (in Chinese) [4] Information on http://www.autodesk.com.cn [5] Guixiang Feng, Qiaofang Zhang: submitted to Journal of China New Technologies and Products (2009) (in Chinese)