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They are generally made of hard materials such as silicon nitride, alumina, silicon carbide and tungsten carbide.
The seal rings are often made of hard materials such as silicon nitride, alumina, silicon carbide and tungsten carbide for their excellent mechanical, thermal properties and chemical stability, and the form error is restricted within the length of one to two helium light band [4, 5].
Journal of Mechanical Engineering, 2012, 48(21), pp: 183-189.
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2013, 227(1), pp: 111-119
Journal of Materials Processing Technology, 2008, 201, pp: 606-611

Materials and methods Materials.
Journal of Hazardous Materials. 137.1(2006): 456–463
Journal of Hazardous Materials. 147.3(2007): 954-963
Journal of Hazardous Materials. 185.2-3(2011): 1287-1294
Journal of Hazardous Materials. 171. 1-3 (2009): 424-430

Extensive research has been carried out to develop joining techniques for these materials.
Materials Science and Engineering A.
Materials Science and Engineering A Vol. 383, (2004), p. 235~244 [4] Gu Xiao-long, Wang Da-yong, Wang Ying, et al.
Materials Science & Technology.
Journal of Materials Processing Technology, Vol. 152, (2004), p. 257~26

Introduction Portland cement is one of the most common and widely used construction materials.
Pal:Mechanical characterization of commercially made carbonfibre-reinforced polymethylmethacrylate.Journal of Biomedical Materials Research, 20 (6) (1986), pp. 817–826 [3] J.M.
Lo:Effect of MMA-g-UHMWPE grafted fiber on mechanical properties of acrylic bone cement.Journal of Biomedical Materials Research, 38 (4) (1997), pp. 361–369 [4] L.D.T.
Kitamura et al: Bioactive polymethyl methacrylate-based bone cement: comparison of glass beads, apatite- and wollastonite-containing glass ceramic, and hydroxyapatite fillers on mechanical and biological properties.Journal of Biomedical Materials Research, 51 (2) (2000), pp. 258–272 [7] P.
Dental Materials, 21 (4) (2005), pp. 365–370 [8] R.

Sommitsch, Microstructure development in hot deformed AA6082, Materials Science and Engineering 528A (2011) 2423
Yannacopoulos, The effect of cold work on the precipitation kinetics of AA6111 aluminum, Journal of materials science 39 (2004) 6495
Merle, A study of high-temperature precipitation in Al-Mg-Si alloys with an excess of silicon, Journal of materials science 34 (1999) 811
Hamerton, Non-equilibrium reactions in 6xxx series Al alloys, Materials science and engineering 304-306A (2001) 119
Kang, The solidification process of Al-Mg-Si alloys, Journal of materials science 32 (1997) 1443.

According to the mix proportion design method of self-compacting lightweight aggregate concrete above, combined with working performance tests, analysis on orthogonal method, finally determined the materials dosage of coarse aggregate volume ratio for 0.52, the sand volume rate for 0.42, fly ash content for 30%.
Fig.3 Cube compressive strength In general, the compressive strength of concrete increased monotone with the time increasing, but growth trend is decreasing and convergence, growth and strength changes under the influence of many factors, such as: cement varieties, admixture, admixture materials and curing conditions.
Journal of the Chinese Ceramic Society, 2000, 28(2):194-198.
Journal of Architectural Science and Engineering, 2008 (4):83-87.
Journal of Xi’an University of Science and Technology, 2004(4):422-425.

Materials and Methods Preparation of the materials It was reported that machining and sawing properties of OPT was difficult and the quality of finished material was rough because of presence of silica [23].
SC was percent solid after evaporation of liquid and volatile materials.
Ahmad, Carbohydrates in the oil-palm stem and their potential use, Journal of Tropical Forest Science 2(3) (1990) 220-226
Ruhendi, Characteristics of wood liquid adhesives from several wood species, Peronema Forestry Science Journal 2(2) (2006) 66-70
Series: Materials Science and Engineering 593 (2019) 012004

The composition determines the thermal shock resistance of materials, but few papers systematically study of the thermal shock resistance of spinel-C material.
Experimental Raw materials.
East china science & technology. 2013:472-472
[4] Wang JZ, Zhao JX, Zhang HX, Effect of carbon resources on properties and microstructure of Al2O3-C materials, J.
Journal of wuhan university of science and technology. 30 (2007) 484-487.

Effect of acid modification on the properties of potato starch pastes and starch film Wenyu Wang *1,a,Xin Jin 1,2,b, Shuanqing Hou1,c , Yufeng Zhang1,d , Xiaoxu Sha1,e 1 State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300160, China 2 Rongsheng Petrochemical Co.
The research on the biodegradable starch-based materials, such as fiber, film, is one of the hot topics.
Experimental detail Materials Potato starch was obtained from Chifeng starch Company.
Acknowledgements The authors acknowledge funding from “State Key Laboratory of Hollow Fiber Membrane Materials and Processes”(201006) of Tianjin Polytechnic University (P.R.China).
Polym,Vol.60(2005),p283 [3] B.Ramaraj, Journal of applied polymer science, Vol.103(2007),p.909 [4]E.Landrea, L.Tighzert, C.Bliard, European Polymer Journal, Vol. 45(2009),p.2609 [5]H.Liu, F.Xie, L.Yu, Progress in Polymer Science, Vol.34(2009),p.1348 [6]C.R.Franco, V.P.Cyras, J.P.Busalmen, Polymer Degradation and Stability, Vol.86(2004),p.95 [7]S.Wang, J.Yu, J.Yu, Food Hydrocolloids, Vol.21(2007),p.1217 [8]C.Aparicio, P.Resa, L.Elvira, Journal of Food Engineering, Vol.94(2009),p295

The caisson is composed of ceramsite box, three matrix materials (medical stone, limestone and ceramic) were installed, four kinds of plants (Ceratophyllum demersum, Myriophyllum verticillatum, Cyperus alternifolius and Iris pseudacorus) were planted.
Environmental Science & Technology, 2007, 30(4):4-6.
Environmental Science & Technology, 2009, 32(6):53-58.
Journal of Heilongjiang Bayi Agricultural University, 2008, 12:19-22.
Journal of Shenyang Jianzhu University (Natural Science), 2006, 22(6):985-988.