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Materials and Experimental Methods Used Materials: Polytetrafluroethylene powder particles (PTFE) were used for reinforcement in this work.
Vikrant, Deshpande, Thermal Properties of Acrylonitrile Butadiene Styrene Composites, Indian Journal of Advances in Chemical Science. 1 (2016) 279-282
Raja, Bollampally, Thermal conductivity, elastic modulus and coefficient of thermal expansion of polymer composites filled with ceramic particles for electronic packaging, Journal of Applied Polymer Science. 74 (1999) 396-403
[4] Anton Panda, Kostiantyn Dyadyura, Jan Valícek, Marta Harnicarova, JozefZajac, Vladimir Modrak, Iveta Pandova, Peter Vrabel, Ema Novakova-Marcincinova, Zdenek Pavelek, Manufacturing Technology of Composite Materials-Principles of Modification of Polymer Composite Materials Technology based on Polytetrafluroethylene, Materials. 10 (2017)377-383
Kim, Bio-based PCM/ carbon-Nano materials composites with enhanced thermal conductivity, Solar Energy Materials. 120 (2014) 549-554

In 3DP process, part has a large contour error due to the print machine, printing parameters, the characters of part materials and other factors.
However, in 3DP process, the printer, printing parameters, the characters of part materials have significant impact on the contours and dimensional accuracy of parts.
Yao [4] studies the powder materials and optimizes the printing parameters, and shortens the parts manufacturing time and reduces the use of powder and binder in 3DP; Besides the materials and printing parameters, the transferring STL model into different file format influences on the part manufacturing accuracy of 3DP too, Yan Liang have studied these effects[5]; W.
Rapid Prototyping Journal, 2006, 1:42-52
Journal of Materials Processing Technology,2001, 119 : 348-353

Introduction With the development of modern biomedical technology and materials science, artificial bone substitute materials are increasingly used in clinical practice.
The alternative materials of biological activity are composed by HAP and SA, which are the preferred materials to form the composite bone scaffold.
[5] Xinwen Zhu, Dongliang Jiang preparation, Ting Hung Tan SiC Reticulated Porous Ceramics [J] Journal of Inorganic Materials, 2000, 5 (6): 1055 - 1060
Rare Metal Materials and Engineering, 2010,1 (39) :530-534
Mechanical Engineering Materials,2007,10:38-40

IPMC (Ion-exchange polymer metal composite) is a kind of novel artificial intelligent materials.
The design method and circuit of a new type of charge amplifier[J],Hefei, Journal of Hefei University of Technology Natural Science, 2006, 12,29 (12):1609-1612
[3] Mojarrad M and Shahinpoor M．Ion-exchange-metal composite sensor films[J]，Smart Structure and Materials,1999,Proc.
[4] Konyo M,Konishi Y,Tadokoro S and Kishima T．Development of velocity sensor using ionic polymer-metal composites[J],Smart Structure and Materials,2004,Proc.
Dynamics determination modulus of elasticity of IPMC based on cantilever beam resonance method[J].Shenyang, Journal of Northeastern University of Technology Natural Science, 2011,10,32 (10):1464-1467.

With the purpose of reducing the bending deformation of the lathe tool, the static stiffness can be increased by the use of high Young’s modulus materials [3,4].
The most frequently used high Young’s modulus materials are sintered tungsten carbide [5] and sintered tungsten alloy with an added 2-4% of copper and nickel which can be machined [6].
Both materials are expensive.
And limited to available materials, the Young’s modulus of materials can not be enhanced without limit [7].
Koren: Journal of Intelligent Material Systems and Structures Vol.12 (2001), p. 617-627 [2] A.

Silicon Nitride and Related Materials [J].
Materials Science and Engineering A , 1991, 149: 129–134
Materials Science and Engineering, 2003：300-305 [6] CHEN Changlian, CHEN Fei, SHEN Qiang, et al .
Materials Science and Engineering A , 2007, 458: 7–10
Materials Science and Engineering, 1985, 71：265-272 [9] LUO Junting, ZHANG Kaifeng, WANG Guofeng, et al .

Research on Moisture Porosity Test of Liner Materials by Explosive Lining Hailiang Wang 1, a, Jianxin YU 1, b 1Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266510, Shandong, China aA405405B@263.net, bsdustyjx@126.com Keywords: Explosive lining; Mortar; Moisture porosity Abstract.
Moisture Pores of Liner Materials by Explosive Lining Moisture pore is the pore that can maintain water in solid materials.
Moisture porosity is the ratio of the water volume within the solid materials and the total volume of solid materials, with percentage terms, such as Eq. 1 below
Moisture Porosity Test of Liner Materials The quality of water in mortar test pieces under different test conditions in the experiment with drying method [6] is measured.
(In Chinese) [5] Hai-liang Wang, Hui-zhe Ding, Min Ma, Xin-ming Li, in: Proceeding of the 2007 International Autumn Seminar on Propellants, Explosive and Pyrotechnics, edited by Ping Huang, Yajun Wang and Shengcai Li, volume 7 of Theory and Practice of Energetic Materials, Section, 3, Science Press (2007) [6] The Ministry of Water Resources of the People’s Republic of China: Water Ratio Test SL237-003-1999 (China, 1999) [7] Hai-liang Wang, Chang-gen Feng, Li-qiong Wang: The Journal of Explosives and Propellants, Vol. 24(2)(2001), p. 12 (In Chinese) [8] Hai-liang Wang, Chang-gen Feng, Zhao-xia Hou, Li-qiong Wang: Explosive Materials Vol. 30(3) (2001), p. 19 (In Chinese)

Acknowledgement This work is supported by project of science and technology of Tianjin science committee (13ZCZDGX01108)and Tianjin University & Education Foundation ( KJY1306).
Domenico: Journal of materials processing technology, Vol.196 (2008) No.1-3, pp.79-87
Li: Journal of South China University of Technology, Vol.34 (2006) No.7, pp.40-44.
Luo: Journal of system simulation, Vol.21 (2009) No.17, pp.5586-5593.
Hu: Metallurgical and Materials Transactions A, Vol.40 (2011) No.13, pp.3245-3257.

Results and discussion Microstructure of the experimental materials.
Journal of HeBei University of Science and Technology, 2000, 1:19-22
[3] Juan-hua Su, Ping Liu, Qi-ming Dong,et al, Aging study of rapidly solidified and solid-solution Cu–Cr–Sn–Zn alloy [J], Journal of Materials Processing Technology, 2008, 205(1–3):366-369
Bulk nanostructured materials from severe plastic deformation, Progress in Materials Science, 2000, 45(2):103-189
Severe plastic deformation: Simple shear versus pure shear, Materials Science and Engineering A, 2002, 338(1-2):331-344

The study of cavitation is of topical interest in both physical and biological sciences.
The surface roughness changes the effect of cavitation on a material surface.
Cavitation can damage and erode solid materials by the following mechanisms: generation of shock waves due to symmetric bubble implosion and formation of micro jets due non-symmetric bubble implosion [6, 7].
It is presumed that the blotch free smooth surface material creates more micro bubbles, thus the cavitation is more in it than the rough surface material.
A, et al., “Rough surface effects on cavitation inception”, Journal of basic engineering, (1968), p. no. 241 – 261