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Experimental materials and methods Film preparation.
Akishiu: Effects of Space Conditions on Materials (Nova Science Publishers, Inc., New York 2001) [2] G.Z.
Wang: Chinese Journal of Space Science, Vol. 19 (1999), p. 375 [5] M.J.
Du: Journal of Anhui Normal University (Natural Science) Vol. 18 (1995), p. 66 [13] T.
Fang: Materials Review Vol. 11 (1997), p. 11 [17] S.

It was assumed that both the CNT and the epoxy matrix behave as linear elastic and isotropic materials.
Y. (2008) ‘Fracture toughness and fatigue life of MWCNT/epoxy composites’, Materials Science and Engineering: A, 494, 380-384
[10] Ganguli, S., Bhuyan, M., Allie, L. and Aglan, H. (2005) ‘Effect of multi-walled carbon nanotube reinforcement on the fracture behavior of a tetrafunctional epoxy’, Journal of Materials Science, 40, 3593-3595
W. (1996) ‘An introduction to composite materials’, 2nd ed., Cambridge: Cambridge University Press, 31
J. and Bernholc, J. (1997) ‘High strain rate fracture and C-chain unraveling in carbon nanotubes’, Computational Materials Science, 8, 341-348

Figure.2 Finite Elemental Model of the Piston Figure.1 Geometry Model of the Piston The Material Properties of the Piston.
The result shows the piston is safe on material allowed stress.
The result shows the temperature, stress and strain of piston are still within the safe operating condition of the material.
References [1] Jing Jiang, Ming Jin, Zhengzhong Jiang: Review of Modern Biogas Engine’s Development and Study, Guangxi Journal of Light Industry, Nanning, pp.36~38, December 2010
Journal of Jiangsu University (Natural Science Edition), Vol.24, pp.37~40, July 2003

The material of the workpiece is 45 steel.
Journal of Harbin University of Science and Technology, Vol. 4(2) (1999), p. 5-8.
The International Journal of Advanced Manufacturing Technology. 2007, 33 (3): 251-259
The International Journal of Advanced Manufacturing Technology, 2009, 43 (3): 348-356
Journal of Mechanical Science and Technology, 2008, 22(2): 293-299.

Preface Zirconia ceramics fonn a truly remarkable group of materials.
These have inspired the well-known series of 5 international conferences "Science and Technology of Zirconia 1-V" and the published proceedings of the same name.
Those proceedings and the journal literature plot the progress of the field from the very early phase stability work to modern work developing quite sophisticated models for the transfonnation toughening associated with the tetragonal (t) to monoclinic (m) phase transfonnation.
It would appear then that in making rapid technical advances, the technology of zirconia has outstripped the science of zirconia, leaving many important questions unanswered.
The volume is structured (somewhat arbitrarily) to begin with the more basic sciences, followed by a consideration of some of the science underpinning zirconias mechanical and physical properties, and concludes with chapters dealing with the production of quality zirconia ceramics.

Materials and Methods: The inter-joined abutments were shaped with the technique of injection of zirconia powder in nanometers.
Zirconia abutment fabrication.1.Threedimensional measurements:According to the measurement made by the laser gauge, liner shrinkage of zirconia materials and the abutment draft was made.
Progress of Ceramic Injection Molding[J].Rare Metal Materials and Engineering,2004, 33(11)：1121-1126 [2].Xie Zhipeng，Yang Jinlong，Huang Yong.
Int. 1999, 25: 551~559 [6].Chan Tienyin，Lin Shuntian．Effects of stearic acid on the injection molding of alumina[J]．Journal of the American Ceramic Society，1995，78(10)：2746-2752 [7].Lin S T，German R M．Interaction between binder and powder in injection moulding of alumina[J]．Journal of materials science，1994，(29)：5270-5212 [8] WJ Tseng，DM Liu，CK Hsu，Influence of stearic acid onsuspension structure and green microstructure of injection-molded zirconia ceramics，Ceram Inter，1999，25：191-195； [9] Zhou Jicheng and Huang Baiyun.
Thermal Debinding Behaviours of Hard-metal Feedstock for Powder Extrusion Moulding [J].Rare Metal Materials and Engineering 2002, 31(3):225~228 [10] Tseng Wenjea J.

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)

Introduction Nanotechnology has revolutionized materials science by enabling the development of functional nanomaterials with enhanced physicochemical properties.
The incorporation of AgNPs into an epoxy matrix provides a functional composite material capable of preventing microbial contamination and enhancing the durability of coatings and packaging materials.
Materials and Methods Materials used for the research are: Silver nitrate (AgNO₃, 99.9%), Telfairia occidentalis leaves, Deionized water, Epoxy resin and hardener, Bacterial strains: Escherichia coli and Staphylococcus aureus.
The micrographs reveal a generally homogeneous distribution of nanoparticles throughout the composites materials.
P (2022) Telfairia occidentalis: A blood booster, an antioxidant and an antihyperglycaemic agent, International Journal of Nutrition and Food Sciences 7(3):1-19

Microstructural images are key components for materials analytic approaches.
Microstructural analysis of slags using Raman micro spectroscope, Journal of Conservation Science, Vol. 35, no. 2 (2019), pp. 145-152
Machine Learning in materials science: Recent progress and emerging applications, Reviews in Computational Chemistry, Vol. 29 (2016)
Image driven machine learning methods for microstructure recognition, Computational Materials Science, Vol. 123 (2016), pp. 176-187
Autonomous Interpretation of the Microstructure of Steels and Special Alloys, Materials Science Forum, Vol. 949 (2019), pp. 24-31

Materials and Methods Leachate Sampling and Characteristic.
Lau, Case Study on the Management of Waste Materials in Malaysia.
Journal of hazardous material, 150 (2008) 468-493
Journal science and engineering, 1 (2012) 1-7
Ghrabi, Landfill leachate treatment with ozone and ozone/hydrogen peroxide systems, Journal of Hazardous Materials, 140 (2007) 316–324