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Phase change materials include solid-liquid phase change materials and solid-solid phase change materials.
Shape-stabilized PCMs compose of the solid-liquid phase change material and the supporting materials by a certain percentage which guarantee the materials not flow and can be processed.
Phase change materials are adopted to add into the common building materials to enhance the regenerative capacity of the wall and save energy.
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Conclusion Composite materials obtained from different raw materials can be used successfully.
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Kadhim, Nanocomposites Materials Definitions, Types and Some of Their Applications: A Review, European Journal of Research Development and Sustainability (EJRDS) (2022) 2660-5570
Hassan, Application of Taguchi Method in the Optimization of End Milling Parameters, Journal of Materials Processing Technology 145 (1) (2004) 84-92
Caglar, Fabrication and characterization of green synthesized ZnO nanoparticle based dye-sensitized solar cell, Journal of Science: Advanced Materials and Devices 5 (2020) 185-191

Acknowledgments This work was supported by the National Natural Science Funds (11272096), the Ph.D.
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* kthangam2010@gmail.coma , ashaa068@gmail.comb Key words: Electric discharge machining, MRR, TWR, Ra, RSM, Genetic algorithm Abstract.Electric discharge machining process is an unconventional machining process primarily used for machining the materials such as difficult to machine in conventional machining process, hardest material and composite materials.
Response surface methodology is used to formulate the mathematical model for material removal rate, tool wear rate and surface roughness.
Introduction Electrical discharge machining (EDM) is a nontraditional machining process which is primarily used for machining hardest materials, composites, dies and molds.
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Sharma, Multi- objective optimization of electric-discharge machining process using controlled elitist NSGA-II, Journal of Mechanical science and technology ,26(6) (2012) 1875-1883

With the development of science and technology, especially the rapid popularization and application of nanotechnology in the life, the development of the materials for badminton racquet string also reaches a higher stage [2].
The unique collective form of the nanofiber determines that the materials which are made from such fibers have very special property in comparison with the traditional materials.
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At present, mullite, cordierite and clay refractory materials are usually used in calcining LiCoO2.
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The suffix m, p and ct stand for the matrix, particulate filler materials and the composite materials respectively.
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