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Biodegradable materials are diverse classes of materials that can degrade by natural processes into compounds harmless to the environment.
Also, together with the advances in science involving biodegradable polymer, there is also a considerable advancement in the method of using these new materials in product development, popularly referred to as 3D printing-additive manufacturing (AM).
Thus, materials science, computer-aided design, and additive manufacturing have converged into the development of tools for 4D printing.
Lagoudas, Toward enabling manufacturing paradigm of 4D printing of shape memory materials: Open literature review, European Polymer Journal 168 (2022) 111106. https://doi.org/10.1016/j.eurpolymj.2022.111106
Kowalczuk, (Bio)degradable biochar composites – Studies on degradation and electrostatic properties, Materials Science and Engineering: B 275 (2022) 115515. https://doi.org/10.1016/j.mseb.2021.115515

Edirisinghe: Journal of Materials Science Vol. 35 (2000), p. 4365
Wang: Materials Letters Vol. 61 (2007), p. 2714
Paschoal: Materials Science Forum Vols. 416 (2003), p. 681
Singh: Bulletin of Materials Science Vol. 32 (2009), p. 515
Gregorová: New Developments in Materials Science Research (2007), p. 77

Rediniotics: Smart Materials and Structures Vol. 9 (2000), pp. 673-83
Young: Journal of Bionic Engineering，Vol. 6 (2009), pp. 232-38
Jiang: Journal of Applied Physics, Vol. 87 (2000), pp. 3321-31
Kwang: Smart Materials and Structures, 2005, pp. 1363-68
Yucai: Journal of Functional Materials, 1979, pp. 18-23.

Microencapsulated phase changed materials (MicroPCMs) have been widely investigated since 1970s in light of the requirements of the renewable and clean energy storage materials [2].
To the best of our knowledge, however, little information is available on preparation of MicroPCMs containing thermochromatic materials.
In addition, the incorporation of thermochromatic powders does not play the role of heterogeneous nucleating agents to C18 crystallization Acknowledgements The authors appreciated the financial support from the National Natural Science Foundation of China (No. 20904040), the Opening Project of State Key Laboratory of Hollow Fiber Membrane Materials and Processes (Tianjin Polytechnic University) and the Science and Technology Development Plan of Tianjin (09ZCKFGX02200).
Yick: Materials Chemistry and Physics 88(2-3) 2004, p. 300 [4] Y.F.
Yick: Journal of Colloid and Interface Science 299-306 (2005), p. 281 [6] C.

All rock mass engineering projects are closely related to rock mass material property.
Song: Chinese Journal of Geothchnical Engineering，2001,23(6):711-713.
International Journal of Rock Mechanics and Ming Science, Vol. 34 (1997) No.8, p.1165-1186. ].
Force is outer factor and deformation is the result of force acting to the material.
The stress change ratio in the material which controlled by itself texture governed the failure types.

Effect of ferric oxide Addition on the Performance of MgO-Al2O3 System Materials Jiansheng Wang1,a, Zhifa Wang1,b,*, Jinglong Bu1,c, Junxing Chen2,d 1Hebei Province Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, Hebei United University, Tangshan, 063009, China 2LIRR Engineering Technolegy Co.
The MgO-Al2O3 system materials were prepared at 1600°C for 3h with magnesia powder and alumina powder as raw materials and with ferric oxide powder as additive.
Szczerba: Journal of the European Ceramic Society.
Mohapatra: Journal of Materials Processing Technology.
Yu, et al: Advanced Materials Research, Vol. 194-196 (2011), p. 1755-1758

Theoretical analysis of fabric behaviour often becomes very complex, and experimental verification of theoretical predictions is more critical than the other materials [1].
Acknowledgement The author thanks the National Science Council for the financial aid to this study.
Ganesh, Prediction of On-axes Elastic Properties of Plain Weave Fabric Composites, Composite Science and Technology, Vol. 45 (1992), p.135-152
Carnaby, Continuum Mechanics of the Fiber Bundle, Textile Research Journal, vol. 55 (1985), p.334-344
Peirce, The Geometry of Cloth Structure, Journal of Textile Institute, vol. 28 (1937), T45-96.

The common feature of these materials is expensive, and not easy to obtain it.
In other words, we use MMA instead of the expensive polymeric materials.
From MMA to PMMA by the way of bulk polymerization • MMA is one of the cheaper polymeric materials In comparison, MMA is one of the cheaper polymeric materials.
Journal of Materials Science: Materials in Medicine, 2005, 16(12): 1121-1124
Journal of display technology, 2009, 5(5): 147-151

Introduction The composite materials are made by combining two or more materials to grant a unique properties combination [1].
These proteins including calcium carbonate (95.0%) in the calcite form and organic materials (5.0%).
Figure 10 shows the optical microstructure of Al and composite materials.
Aigbodion,” Effects of eggshell on the microstructures and properties of Al-Cu-Mg/eggshell particulate composites ", Journal of King Saud University - Engineering Sciences, 27, 49-56, 2015, [4] Gheorghe and Rack, "Powder Processing of Metal Matrix Composite", Comprehensive Composite Materials, Vol. 3, Elsevier Oxford, pp. 679-698.2000
Chandrashekar, "Effect Of Weight Percentage On Mechanical Properties Of Frit Particulate Reinforced A16061 Composite", Arpn Journal of Engineering And Applied Sciences, Pp32-36, Vol. 5, No. 1, 2010

By comprehensive contrast of the wear resistance of hardening materials, relative wear resistance of composite iron plating is better than common engine cylinder material, and can fit for the cylinder hardening of high load engine.
The wear resistance of composite iron plating is higher than the other two materials not only at the low and middle but also at the high load.
Then the wear rules of hardening materials are studied.
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