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Microstructure and Mechanical Properties of Al2O3/Tial in Situ Composites Doped with Cr2O3 Fen Wanga, Liuyi Xiangb, Jianfeng Zhuc, Dong Lid, Xiaofeng Wange Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi’an, 710021, China awangf@sust.edu.cn, bsixone317@163.com, czhujf@sust.edu.cn, dlidong-qycl@163.com ewang3164153@126.com Keywords: Al2O3/TiAl Composite; Cr2O3-Doped; In Situ Reaction Microstructure; Mechanical Property Abstract.
The structure of the as-synthesized composites becomes finer with more uniform distribution and dispersion of Al2O3 particles, and the grain size of the matrix become smaller.
The bright areas change from an agglomerating state into an interpenetrating network structure.
Based on the above analysis, the improvement of mechanical properties may be attributed to the homogeneous distribution of Al2O3 and the fine structure of TiAl with smaller grain size.

Zirconia exists in three different crystal structures: monoclinic, tetragonal and cubic.
The fluorite cubic structure of zirconia can be stabilized at room temperature by the addition of Y2O3 forming solid solution (YSZ).
In our study, yttria stabilized zirconia nanopowders with cubic structure were synthesized by hydrothermal method.
Sōmiya: Materials Chemistry and Physics.

Because of its special structure, PPS had excellent high temperature resistance, chemical resistance and flame resistance, good dielectric properties and thermal stability.
Fourier transform infrared spectrometer (FT-IR, Nicolet5700) and Raman spectrum (Nicolet Raman 960 ) had been selected to observe the chemical structure of the sample.
In addition, the layeredtablets structure from MMT play a shield, slow and insulation effect of the outflow of volatiles materials.
Principles of modern chemistry. 4th ed.

In the crystal structure of perovskite-type LaMeO3, the Me is transition metals which consist of Fe3+ , Mn3+, Mn 4+ , Co 3+ , Al3+ and Cr 3+ .
Based on the combustion theory[10] , the reaction equation was: OHNCO LaMnO OHNHOHCOHNOMnOHNOLa 22123263 232786262)3(262)3( +++ ⎯→⎯ Δ ⋅+ +⋅ +⋅ The as-synthesized powder was treated at different temperature, and the color of the product was all black when keeping temperature at 700℃ and 1000℃ for 2 hours respectively. 1.2 Structural determination and dielectric properties experiment Fourier transform infrared spectrometer (FT-IR, AVATAR-360,NICOLET, American) was used for monitoring the structure changes of the precursor and product.
Through comparison the XRD data of the product with the standard, it was confirmed that the perovskite-type crystal structure was obtained by the complex base salts auto-combustion reaction.
Sensors and Actuators, B, 2000,64:83-87 [7] Xiwei Qi, Ji Zhou, Materials Chemistry and Physics, 2002, 78:25-29 [8] Monica Popa, Johannes Frantti, Masato Kakihana.

Experimental Setup Engine Platform.Table1 shows the structure parameters of the gasoline engine.The dynamometer Controller and WE33 Dynamometer are produced by Yike Mechanical and Electronic Co.
Table.1 Structure Parameters of the Gasoline engine Structure Parameters Injection Mode Cylinder Bore Stroke Rated Speed Rated Power Aftertreatment Device Displacement Emission Standard Indicators Port Fuel Injection 86mm 85mm 6000Rpm 112Kw Three Way Catalyst 2L National Phase Ⅲ 1.Engine;2.ExhaustPipe;3.WE33Dynamometer;4.Dynamometer Controller;5.DMS 500 Differential Mobility Spectrometer;6.Data Acquisition;7.Air Container Fig.1 Experimental unit schematic diagram Fig.2 Schematic diagram of measuring principle of DMS500 Cambustion DMS 500.This Differential Mobility Spectrometer provides a number / size spectrum for particles between 5nm and 1000nm. (5nm – 2500nm is also possible at different operating conditions.)The instrument uses a classifier column operating at sub-atmospheric pressure,using a scroll vacuum pump. 2 shows schematic diagram of measuring Principle of DMS500.
[7]Xinling Li,Zhen Huang,Jiasong Wang,Xiaoping Zhou Measurements of Particulate Size Distribution from a Gasoline Engine[J].Environmental Chemistry.2008,27(001):64-68 [8]Tarun Gupta, Abhishek Kothari.

The control system can be composed of a three WNN layer, the structure is shown as figure 2: Fig.2 Structure of wavelet neural networks The requirement here is the i-node input for layer 1, represents the i-node enter for the layer k, denotes the i-k layer node output [5].
Table 1 Principal Component Analysis for different value of PCA numbers PCA variable 85% 3 DO ORP PH 88% 4 DO MLVSS PH Ammonia 90% 4 DO ORP PH MLVSS 92% 5 DO ORP PH MLVSS Ammonia Taking into account the changes of COD concentration in the sewage treatment process is running plays a decisive role for the entire system, while other parameters indicators are online real-time measurement, write program for matlab simulation, making COD predict curve and the error curve of wavelet neural network model, WNN using the three-layer structure, according to Table 1, were selected four parameter index MLVSS, PH, ORP and DO as input for network training.
Industrial & Engineering Chemistry Research, 2010, 49(2): 11530-11546

Although there has been much work about preparation of antireflection structures on single Si surfaces by using noble metal assisted chemical ecting, further reseach is still needed for deep understanding the etching process and etching mechanism.
In this paper, porous Si is prepared by chemical etching in HF-H2O2 solutions with Ag nanoparticles as catalyst, and its structure and reflectivity are investigated.
In general, fine, uniform and single dispersed Ag nanoparticles benefits to prepare a uniformly porous structure on the Si surface.
Zhu, L.C Zhao: Progress in Chemistry 24 (2012) 1955-1965, in Chinese

What’s more, it will have influences on microbial flora and destroy the soil structure, therefore causing secondary pollution and other ecological problems.
This technology can not only repair soil, maintain soil fertility, keep soil structure away from destruction, but also create a better environment to living organisms.
However, when existing heavy metal - organic compound co-contamination in soil, a single remediation method is ineffective, then we can use micro-chemistry combined remediation.
Cadmium and lead in lettuce, peanuts, potatoes, soy beans, sweet corn and wheat Jour, Agricultural and Food Chemistry. 31 (1983) 1240-1244
Zhou, New researching progresses in pollution chemistry of soil environment and chemical remediation, Environmental Chemistry. 25 (2006) 257-265

However, these techniques have one drawback since, the impurities in kaolin such as muscovite and quartz in the kaolin structure, which depend on temperature and alkaline activation.
The solid products were formed to zeolite A at 1M NaOH hydrothermal with 500oC to 800oC calcination and it can be seemed good of euhedral structure at 700oC.
The structure which can be formed zeolite A because kaolin was contained hydrate-aluminosilicate (Al2Si2O5(OH)4) compound.
Secondly, the natural kaolin was calcined at 500-800 ℃ for 3 hours in an electric furnace for destroy the kaolinite structure and remove the impurities in kaolin.
Breck, Zeolite molecular sieves: structure, chemistry, and use, Wiley, New York, 1973 [2] E.Araujo, Hildebrando, Synthesis and characterization of zeolite NaP using kaolin waste as a source of silicon and aluminum Materials Research, 17 (2014), pp. 174-179 [3] Mousa Gougazeh , J.

This study aims to increase the tendency of osteoblast's cell attachment to the surface of implant Ti-6Al-4V by fabricating nanotube structure on the surface by anodization.
This study also conducted to study the effect of elements from titanium alloys and organic electrolytes on the mechanism of formation of nanotube structures.
Nevertheless, previous research [15] explained that the formation of nanotube structures with organic electrolytes produced longer tube length and better self-organized TiO2 nanotube layers were obtain, due to highly viscous electrolytes.
Other than that, overall SEM morphology shows that the length of the tubes did not equal, it because of Ti-6Al-4V contains two phases (α and β) which has different chemistries, α phase enriched with Al and β phase enriched with V.
Aucouturier, “Structure and Physicochemistry of Anodic Oxide Films on Titanium and TA6V Alloy,” Surf.