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Introduction The demand for materials with keeps good mechanical properties at high temperatures is increasing in the aerospace industry.
Currently, the dominant materials in the hot zone of aeronautical turbines are metallic superalloys that withstand temperatures above 1000 ºC [1].
Among Ceramic Matrix Composite Materials (CMCs), those with a silicon carbide (SiC) matrix are the most used for the manufacture of aeronautical engines [5].
Brooks, The contribution of advanced high-temperature materials to future aero-engines, Proc I Mech Eng, 215 (2001) 63-73
Novovic, On understanding the microstructure of SiC/SiC Ceramic Matrix Composites (CMCs) after a material removal process, Materials Science and Engineering, 743 (2019) 1-11

So the preparation of TiAl-based alloy materials processing technology is the development and application of TiAl-based alloy key issue.
ACKNOWLEDGE This paper is supported by China Three Gorges University Research Fund (0620100021) project, special thanks to China Three Gorges University, School of Mechanical and Materials help.
Materials Science and Engneering A. 1995,192/193:774~779 [2] S.
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Materials for Advanced Power Engineering. 1998,933~941

On the other hand, the strength of graphite materials is affected by microstructures such as grain size and pore size in the components.
However, the strength ratio (biaxial strength/ tensile strength) due to biaxial effect for isotropic and anisotropic materials is the same.
Weibull: "A statistical theory of the strength of materials", Proceedings of Royal Swedish Institute for Engineering Research No. 151 (1953) [2] R.J.
Barnett et. al: "Fracture of Brittle Materials Under Transient Mechanical and Thermal Loading", Report AFFDL-TR, 66-220 (1966) [8] K.
Hagg et al: Journal of Nuclear Materials, 171, 41 (1990)

Numerical Simulation on Structural Strength of Cam Mechanism for Automobile Panel Die Da-sen BI1,3,a, Xiao-long CHEN1,b, Liang CHU1,2,c 1.School of Materials Science and Engineering Tianjin University of Technology Tianjin 300384, China 2.Key Laboratory of Display Materials & Photoelectric Devices（Tianjin University of Technology）, Ministry of Education，Tianjin 300384, China 3.Tianjin Key Lab for Photoelectric Materials & Devices,Tianjin 300384,China atjbds@sina.com, bchenxiaolong_lgtj@163.com,cchuliangszhm@163.com Corresponding author:chuliangszhm@163.com Keywords: Cam mechanism; Finite element; Numerical simulation; Stress; Strain Abstract.
Material properties and meshing.
Mechanism material use 45# steel as the overall material.
Advanced Materials Research Vol.199-200(2011), p.1623-1628 [4] Shen-di Zhu, Xiang-wei Fang, Min-da Wu, et al. in: Data Handbook of Mechanical Engineering Material Properties, edtied by China Machine Press, Beijing(1994), in press.
Journal of Machine Design Vol.26, No.5（2009）, p.64-66, 70.

The raw materials used for preparing test pieces were SiC powder of 99.0 % or greater purity, graded to average grain sizes of 0.5 μm, 1 μm, 2 μm, and 4 μm, and carbon powder of 99.98 % or greater purity, graded to an average grain size of 0.3 μm.
Page: “Microstructural characterization of “REFEL”(reaction-bonded) silicon carbides”, Journal of Materials Science, Vol. 13, (1978), p. 885-904
Itoh: “Development of high-strength reaction-sintered silicon carbide”, Diamond and Related Materials, Vol. 12, (2003), p. 1201-1204
Suyama: “Evaluation of Microstructure for High-Strength Reaction-sintered Silicon Carbide”, Journal of the Society of Material Science Japan, Vol. 57, No. 3, (2008), p. 304-309
Petch: “The cleavage strength of polycrystals”, Journal of the Iron and Steel Institute, Vol. 174, No. 5, (1953), p. 25-28

Preparation of Cement Water Reducer of Modified Lignosulfonate Xiuwen Wu1,a, Heng Zhang2,3,b 1College of Chemistry and Environmental Engineering, Dongguan University of Technology, Dongguan,Guangdong 523808, China 2School of Chemical Engineering ,Qingdao University of Science & Technology, Qingdao, Shandong 266042, China 3Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing, Jiangsu 210037, China a, bhgzhang@qust.edu.cn Keywords: Lignosulfonate; water reduction agent; synthesis Abstract: In this paper, the cement water reduction agent from modified lignosulfonate was synthesizd using a new process consisting of pre-oxidation, hydroxymethylation and sulfonation.
Experimental Materials Eucalyptus kraft pulping black liquor was obtained from a Chinese pulp mill.
Table 1 Composition of black liquor Solid content (%) Ash (%) Gross calorific value (kJ/kg) Net calorific value (kJ/kg) Lignin (%) Ratio of inorganic and organic materials(%) Content 34.6 37.4 13320 11280 40.3 0.60 The chemicals used in this study include: hydrogen peroxide, formaldehyde solution, sodium sulfite, sulfuric acid, sodium hydroxide, deionized water, ordinary portland cement (PO42.5R).
Acknowledgment This work is supported by the opening project of Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology (200905).
Journal of Dalian University of Science & Technology,2004,(1):21-30

Hashim1,c 1Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor Malaysia anurfadilahbaharuddin@gmail.com, bahalim@science.upm.edu.my, cmansor@science.upm.edu.my Keywords: Addition; superconducting; resistance; transition temperature; solid state reaction Abstract.
After weighing, the materials were mixed and ground using mortar and pestle.
Fahr, Zn Doping of YBCO in Melt Textured Materials : Peak Effect and High Trapped Fields, Physica C 330 (2000) 181-190
Sheng, Yu Aiping, GU Yangni, WU Xiaoshan, Effect of Yb2O3 Additives on Structures and Transport Properties of YBa2Cu3O7-δ , Journal of Rare Earths 28 (2010) 434-438
[14] Lei Wang, Yanpeng Qi, Zhiyu Zhang, DongliangWang, Xianping Zhang, Zhaoshun Gao, Chao Yao and Yanwei Ma, Influence of Pb Addition on the Superconducting Properties of Polycrystalline Sr 0.6 K0.4Fe2As2, Superconducting Science and Technology, 23 (2010) 054010 [15] R.J.

In the production and processing of chemical products and related materials, various additives containing heavy metal ions and additives such as cobalt ions are used to improve some products' performance, which will result in serious environmental pollution problems, especially metals contamination problems in the industrial wastewater.
Experimental Materials Cobalt chloride (AR), anhydrous ethanol (AR), potassium sodium tartrate (AR), ammonium acetate (AR), 2-ethylhexyl phosphate (P204), sodium hydroxide (AR), dimethylglyoxime ( AR), nitroso-red salt (AR), sulfuric acid (AR), ammonium persulfate (AR), hydrochloric acid (AR).
Acknowledgements This work was supported by the Scientific Research Foundation of Education Department of Yunnan Provience (No.2011Z133C) and Yunnan Provience Science and Technology Projects (No.2011FZ194).
[3] Wu Z.J., Chang Y.Y., Li G.M., Wei R.: Environmental Protection Science. 2004, 30(122) 30 [4] Li Y.D., Yuan Z.H., Li H.Q., Tian H.: Chinese Agricultural Science Bulletin. 2007, 23 (8) 458 [5] Yang Z.K.: Enviromental protection of chemical industry. 1996,16(4) 195
[6] Zhong T., Le Z.G.: Chemical Industry Times. 2008, 22(10) 56 [7] Liang R.W., Wang X.D.: Journal of Water Resources & Water Engineering, 2005, 16(4), 46

The mixture of the required raw materials was ball-milled with water for about 3 h, to make thick slurry to enable its uniform and thin application on the stainless steel substrate by conventional air-spraying process.
Acknowledgements This study was supported by Natural Science Foundation of China (No.50774073) and National Key Technology R&D Program in the 11 th 5-Year Plan of China (2006BAC02A14).
Yoshimura: Corrosion Science Vol. 45 (2003), P.531
Zhang: Journal of Power Sources Vol. 185 (2008), P. 419
Mermoux: Materials at High Temperatures Vol. 22 (2005), P. 105

Therefore, how to improve the performance and look for the more ideal materials will be the key technology in future research.
We are grateful for the financial support by National Natural Science Foundation of China (Grant NO. 11274092 and 11274091), Natural Science Foundation of Jiangsu Province (Grant NO.
BK20130238), Changzhou Science and Technology Support Projects(Grant No.
Applied Mechanics and Materials, 2013, (327):703-707
Chinese Journal of Electron Devices, 2008, 31(4):1081-1084