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Refractory true density index reflect the purity of the material, phase transition and sintering degree, which often correspond to the change arise in materials [1,2].
Measurement Mechanism The mechanism of AccyPyc1330 automatic true density analyzer is gas replacement technology by measuring the real porous volume of materials and irregular materials result from gas expansion (Bohr's law) and volume replacement.
Gu, et al: Refactory Materials (Metallurgical Industry Press, Beijing, 2010), p. 120 [4] S.B.
Gong: Journal of Magang Staff and Workers’ University.
Sun: Inspection and quarantine science.

The porous paving materials can effectively reduce noises that produced by vehicle road and pavement friction [6-10].
Experiment and Test materials This research project uses the PO. 42.5 cement, 9.36-13 .6 mm gravel, W: C = 0.35, fine sand.
Sound absorption principle of porous materials is that sound can be effectively attenuated, showing long and short acoustic properties of materials.
(in Chinese) [6] Liheng Lei, Ronggui Liu: Concrete, (2009), p99-101. ( in Chinese) [7]Qingjun Ding, Fan Shen, Xinquan Liu: Chang'an University (Natural Science Edition), (2010), p24-28. ( in Chinese) [8] Baoguo Ma, Dingbang Wei, Xianguo Lee etc: Wuhan University of Technology, (2010), p69-71. ( in Chinese) [9]Ronglong Zhao, Dongfeng Yin: Highway and Transportation Research (Applied Technology Edition), (2009) p 62-65. ( in Chinese) [10] Chunying Zhu, Jianming Gao, Jinhua Zhang: Jiangsu Building Materials , (2009),p 23-26. ( in Chinese) [11]Lan Wang, Yongming Xing, Baoli Tang,etc.: Journal Of Inner Mongolia University Of Technology. (2009):p306-310.
(in Chinese) [12] Donglin He, Zhancheng Guo, Hongjiang Liao: Materials Science, (2012 -S1), p303-306 +333. ( in Chinese) [13] Penghui Liu, Yiqian Yang, Jingchuan Yao: Noise and Vibration Control (2011), p123-126. ( in Chinese)

Pashkov, Tribotechnical properties lead bronzes, Applied Mechanics and Materials. 379 (2013) 87 - 90  [3] N.V.
Pashkov, Bronze sealing rings defects and ways of its elimination,  Applied Mechanics and Materials. 379 (2013) 82 - 86  [4] T.V.
Martyushev, Creation of ceramic nanocomposite material on the basis of ZrO2-Y2O3-Al2O3 with improved operational properties of the working surface,  Applied Mechanics and Materials. 379 (2013) 77 - 81  [5] S.N.
Tomchik, Simulation of active shielding gas impact on heat distribution in the weld zone, Materials Science Forum. 762 (2013) 717-721 [8] E.N.
Agrenich, Computer simulation of thermo-mechanical processes at fusion welding of alloyed steels, Materials Science Forum. 575-578 (2008) 833-836

LSP is to use intense laser and suitable overlays to generate high intense shock waves on the surface of work-piece, driving the compressive residual stresses deep into the subsurface materials.
Compressive residual stresses are significantly influenced by thickness of materials, and the maximal residual stress was -500MPa~ -550 MPa at surface of 6 mm-thickness specimen.
Materials Science and Engineering A 335 (2003) 216-230 [3] Graham Hammersley, Lloyd A. hackle, Fritz harris.
Materials Science and Engineering A 386 (2004) 291-295 [5] Zou Shikun, Gong Shuili, Guo Enming, Li Bin.
The European Physical Journal Applied Physics, 1998 (3): 215-218

Effects of Coating on Surface Recrystallization of DD6 Single Crystal Blades Yuliang Jia1,a, Yunsong Zhao1,2,b, Yushi Luo1, Shuai Yang1, Jianwei Xu1 and Dingzhong Tang1 1 Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China 2 State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China a415204254@qq.com, bzhaoyunsong2008@gmail.com Keywords: DD6 single crystal superalloy, Turbine blade, Coating, Surface recrystallization.
Journal of Aeronauticcal Materials. 31(S1)(2011) 90-93
Materials Science and Engineering B. 32(3)(1995) 255-266
Advanced Materials and Processes for Gas Turbines. (2002) 63-73
Liu, Recent develepment in materials design of thermal barrier coatings for GAS turbine.

It is an ideal filler for composite materials and metal materials [1].
Experiment Raw materials.
The flammability of polymeric materials depends on the oxidation index.
And, the material with the oxidation index below 21 is flammable materials. .
They had come up to be non-flammable materials

Aono, Nature Materials. 6(2007)833-840 [3] H.S.P.
Szot, Advanced Materials 21 (2009)2632
Kim, Nature Materials 10 (2011)625
Li, Frontiers of Materials Science 6(2012) 183
-H.Ko, Journal of Vacuum Science & Technology B 31(2013) 032206

Traditional techniques mostly take lime; lime-fly ash and cement-lime-fly ash as soil stabilizer [5], the ratio of solidified materials depend on the different salt content.
Based on the current poor engineering properties of saline soil, combined with the needs of roadbed fillers and low-grade rural road construction, how to find economically reasonable and effective curing materials with matched technologies is the key to solve the shortage of road construction materials in saline soil areas.
This paper configured a waste-based soil solidification material (hereinafter referred to as FD solidification agent) to achieve good solidification of saline soil based on the high activity waste materials and the principle of geological polymerization.
Materials and Tests Saline Soil.
,In: Experimental study on improved physical properties and water stability of coastal saline soil, edited by Journal of Hebei University of Engineering (Natural Science Edition) , Forum Vol. 36 (2019), p.8-64

Testing Materials, 42, 1943
Key Engineering Materials, 761 (2018) 45-48.
Key Engineering Materials, 761 (2018) 193-196
Key Engineering materials, 761 (2018) 35-38.
Materials science forum, 865 (2015) 95-106.

Concrete Material Model.
Numerous material models have been developed for concrete and similar brittle materials.
So the higher requirement is put through for the concrete material model[8],[9].
Reinforcement Material Model.
Johnson-Cook material model is good at analyzing the high strain rate , large deformation and high temperature response of material, which are widely used in numerous material especially for most of metal material.