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Materials and Methods Materials PT provided spent nickel catalyst.
Table 2 Lattice parameter of NMC 622 materials Sample a (Å) c (Å) Lattice parameter (c/a) Intensity ratio (IR) R coeff.
Journal of Alloys and Compounds, 739, 607-615
Journal of Hazardous Materials 176 (1–3): 1122–25. https://doi.org/10.1016/j.jhazmat.2009.11.137 [21] Cheng, Qian, William M.
Energy Storage Materials, 24(May 2019), 188–197. doi: 10.1016/j.ensm.2019.08.020

Jain, Fundamentals of Friction Stir Welding, Its Application and Advancements, Materials Forming, in: J.P.
Bhatnagar Friction Stir Spot Welding of advanced high-strength steels - A feasibility study, SAE International, Journal of Materials and Manufacturing, 2005-01-1248, 2005
Cho, H.N.Han, Behaviors of Friction Stir Spot Welded Joints of Dissimilar Ferrous Alloys under Opening-Dominant Combined Loads, Hindawi Publishing Corporation, Advances in Materials Science and Engineering 1 (2014) 1-12, http://dx.doi.org/10.1155/2014/572970 [18] H.
Nelson, A review of Friction Stir Welding of steels: tool, material flow, microstructure, and properties, Journal of Materials Science & Technology 34:1 (2018) 39-57
Zhou, Resistance and friction stir spot welding of DP600: a comparative study, Institute of Materials, Minerals and Mining, Science and Technology of Welding and Joining 2, 12 (2007) 175-182 [23] A.

Study on Effect of Different Preparation Process Parameters on Properties and Microstructure of SiO2/Cu Composites Cuihua Zheng 1,2,a, Kexing Song 1,2,b , Xiuhua Guo 3,2,c , Yanjun Zhou 1,2,d, 1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China 2Henan Key Laboratory of Advanced Non-ferrous Metals, Luoyang 471003, China 3School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China azhengch74@163.com,bkxsong@mail.haust.edu.cn, c guoxiuhua@sina.com, ddazhou456@163.com Keywords: Powder metallurgy; SiO2 nanoparticle; Conductivitity rate; Hardness; Wear behavior Abstract.
When porcelain body of composite materials was sintered, copper matrix and enhance phase nanoparticles does not react.
So as to improve the wrong strength and hardness of the composite materials.
Lee, ect., Metallurgical and Materials Transactions A Vol. 35(2004), p.493-502 [2] M.
,Transactions of Materials and Heat Treatment Vol. 28 (2007), p.10-16, In Chinese [6] L.

Induced polarisation (IP) Induced polarization (IP) is a geophysical imaging technique used to identify subsurface materials, such as ore.
The dielectric properties of materials correlate with many of the mechanical and geologic parameters of materials.
Journal of Applied Geophysics.
Cold Regions Science and Technology.
Journal of Applied Geophysics.

This means that the tools should be made using materials resistant to hot oxidation [6].
Park, Satoshi Hirano, Stir zone microstructure of commercial purity titanium friction stir welded using pcBN tool, Materials science and engineering A, 488 (2008) 25-30
Satoh, Mechanical properties of high purity polycrystalline cBN synthesized by direct conversion sintering method, Journal of materials science, 35 (2000) 1181-1186)
Ramulu, Identification of process parameters for friction stir welding Ti-6Al-4V, Journal of engineering materials and technology, 132 (2010)
Bahemmat, Investigations on the effects of the tool material, geometry and tilt angle on friction stir welding of pure titanium, Journal of materials engineering and performance, 19 (2010) 955-962

Introduction With the development of modern science and technology in the fields of high performance magnetic bearings, high strength/weight composite materials and electronics, the flywheel energy storage system technology has tended to mature.
The rotation speed of this flywheel rotor is set 50000rpm and the multi-ring composite components adopt the same materials.
The half-elliptic isoline near the inner surface illustrated the weakness of the metal materials graphically.
There are many approaches to reduce the maximum stress of the structure to ensure the safety of metal materials.
Journal of TsingHua University (Science and Technologh).

Conventional Friction Stir Welding (FSW) is that weld materials are joint at room temperature by stirring softened materials due to frictional heat of rotating tool.
In this case the test was carried out with no defective welded materials.
Fig.8 Comparing the tensile strength in welded materials by FSW with heating at 150 o C and 300 o C, and base materials.
Besides, the strength of non-heating welded material was equivalent to these welded materials.
Thomas: Welding Journal Vol. 75-3 (1996), p. 41-45

Developing science and technology of construction and adopting suitable constructing technology are the foundation of ecology residence.
Reinforcing production of building materials, dwelling building and taking charge of the renovating are the key of construction of ecology residence.
First,developing the technology of building materials,reduces the consumption of energy and raw material,reduce the destruction and pollution of environment during the process of material production.Vigorously develops the reuses materials of green building materials and the equipment of economizing energy and economizing water.
The design and construction of ecology housing have direct relation with the two aspects which is the rule of market economy and the control and requests of government.About the production of building materials,if the factory uses advanced science and technology,saved the energy,the land,the water,it will directly reduce the cost of production,to enhance profits,because of benefit maximization,it leads to factory actively to explore diligently in these aspects.
[2] Li Luming :Overview of green building assessment abroad,World Architecture 2002(1),p.11-12; [3] Zhang Kai:Study on the construction of Ecological Residential District of city,Science Press, Beijing,2003,p.22-23 [4] Zhu Yiding,He Shengyun: Problems and development tendency of housing construction in China,Journal of HeFei University of technology (Natural science),2008(2),p.237-240 [5] Runming Yao,Koen Steemers,Baizhan Li:Sustainable Urban and Architectural Design,China Architecture & building Press, Beijing ,2006,p.159-237 [6] Jiang Yi,Lin Borong,Zeng JianNong,Zhu YingXin: Energy Efficiency in Residential Building, China Architecture & building Press, Beijing ,2006,p.3-8 [7] Yuan Bin,wang DaWei: Analytic on our Green Building Evaluation Criteria, Intelligent Building and City information,2007(4),p.14-18

Common modification approaches include blending or doping, grafting, coating tailored materials onto the surface or bulk of the membrane, and plasma treatment [20].
Hence, ALD can be a more effective alternative to modify a broad range of materials commonly used in membrane fabrication [29].
Another obvious challenge in the scalability of the ALD-modified membrane is the possibility of leaching out of the deposited materials in a long-term membrane operation [24].
Lei, ‘Aramid Nanofiber Membranes for Energy Harvesting from Proton Gradients’, Advanced Functional Materials, vol. 32, no. 1, p. 2102080, 2022, doi: 10.1002/adfm.202102080
Dorsey et al., ‘Atomic Layer Deposition for Membranes, Metamaterials, and Mechanisms’, Advanced Materials, vol. 31, no. 29, p. 1901944, 2019, doi: 10.1002/adma.201901944

As composite materials are tailor made materials, the selection of the type of matrix, reinforcements and fabrication method depend mainly on the desirable properties according to the required applications [1].
[6] R.Reddy Nagavally, composite materials, history, types, fabrication techniques, advantages and application, International Journal of Advances in Science Engineering and Technology, ISSN: 2321-9009, Vol-4, Iss-3, Spl.
[12] B.Sethupahi, A.Muthuvel, Prakash, S.W.Louis, Numerical analysis of a rotor disc for optimization of the disc materials, Journal of Mechanical Engineering and Automation, 5(3B),2015 , 5-14
[22] S.Wu, Y.You, P.An, T.Kanno, H.Nakae, Effect of modification and ceramic particles on solidification behavior of aluminum-matrix composites, Journal of Materials Science, Vol.37, 2002, 1855-1860
[28] M.S Kaiser, Effect of solution treatment on wear behavior of Al-12Si-1Mg piston alloy containing trace Zr, MAYFEB Journal of Materials Science, Vol. 1 (2016)-pages27-38