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It is concluded that the structure of the precipitate formed in aged material does not correspond to any of the known inter metallic nickel-silicon compounds.
Further TEM work[4,7,15,16] indicates that the structure of the precipitated phase in the maximum strengthening range of the alloys is δ-Ni2Si.
Precipitates may consist of both Ni2Si and Co2Si phases, and the two phases are difficult to be distinguished since they have the same structures and very close lattice parameters.
Jin, Structure and strength of the age hardened Cu–Ni–Si alloy [J], Materials Chemistry and Physics. 79 (2003) 81-86
Noble, Precipitate structure in a Cu-Ni-Si alloy, Journal of Materials Science. 29 (1994) 218-226

Hossain et al. [12] reported chemical bath deposition method to synthesize CdSe nanoclusters with bubble-like structure on TiO2 nanotube array surface to obtained CdSe-TiO2 composite films.
Structure characterization and photoelectric properties measurement.
Results and discussion Morphologies and structures.
Wang, Influence of doping SiO2 on structure of Ru-TiO2 catalysta and catalytic wet oxidation activity of succinic acid, Environ.
Photobiol., A: Chemistry. 217 (2011) 68-75

Structures of corncob acid hydrolyzed residua and dry pulp were observed by electronic microscope.
Fig.3 Change of ash content under different pulping conditions Structure Characteristic of corncob acid hydrolyzed residua and pulp.
The structure of corncob acid hydrolyzed residua was changed after pulping reaction(Fig. 4).
It was expected that acid hydrolyzation and loose structure of corncob make these pores appear.
Cellulose Chemistry and Technology, 1995, pp. 29-40

The molecular structure and physicochemical properties change, thus it obtains the reversible thermos plasticity and restore the processing performance.
However, it belongs to thermosetting plastics, having non-reversible curing reaction characteristics, non- linear mesh crosslinked structures.
(3)Regeneration: It not only causes the material further tiny to crush, but also urges the internal structure and chemical properties changes, mechanochemical effects have taken place.
The experimental apparatus of Physical Regeneration Regeneration is the key process of thermosetting phenol resin recycling; the mechanical structure of regeneration device designed is shown in figure 2, including three parts of structures: cutting, grinding and mixing. 1.
High polymer material-environment and sustainable development[M].Beijing:Light Chemistry Press.2006 [2] Peters K.

The phase structure of active screen ion sulphurized layer is examined by D8ADVANCE X-ray diffractometer.
Results and Discussion Morphologies and Structure.
It can be seen in Figure 3(a), the active screen ion sulphurized layer has loose and porous structure, and the sulphide grains dimensions are very fine and in micron nano scale.
On the other side, the active screen ion sulphurized layer has loose and porous structure tending to store more grease, which make the friction surface be lubricated by the grease all the time.
Chemistry heat treatment interlocution[M].

For example, spider silk achieves a perfect balance between strength and toughness due to its hierarchical structure including β-sheet, α-helix and random coil structures.
Conclusions By introducing similar secondary structures in spider silk, PUUs film material with high elongation (~1200%) were prepared.
"Influence of secondary structure and hydrogen-bonding arrangement on the mechanical properties of peptidic-polyurea hybrids."
Journal of Materials Chemistry B 2.17 (2014): 2554-2561
Smart materials and Structures 15.6 (2006): 1547.

The structures of synthesize SAP was characterized by Fourier Transform Infrared Spectroscopy (FTIR) and morphologies of synthesize SAP was examined by Scanning Electron Microscope (SEM) testing.
At this point, SAP become very loosely crosslinked networks lead to the increasing of porous formation with flexible structure which can give high facilities for water molecules attraction to the sample.
On top of that, the structure is not allowing for swelling and holding a large amount of water.
FTIR determined the crosslinking structure and all characteristic bands in SAP.
Li, Synthesis and Swelling Behaviors of P(AMPS-co-AAc) Superabsorbent Hydrogel Produced by Glow-Discharge Electrolysis Plasma, Plasma Chemistry and Plasma Processing. 33 (2012) 219-235.

Designing SiC Based CMUT Structures: An Original Approach and Related Material Issues Marc Portail1,a, Sébastien Chenot1,b, Mahdis Ghorbanzadeh-Bariran1,c, Rami Khazaka2,d**, Luan Nguyen1,e, Daniel Alquier2,f and Jean-François Michaud2,g 1CRHEA, CNRS-UPR10, Université Côte d’Azur, Rue Bernard Grégory, 06560 VALBONNE, France 2Université de Tours, GREMAN, UMR-CNRS 7347, 16 rue Pierre et Marie Curie, BP 7155, 37071 TOURS cedex 2, France ampo@crhea.cnrs.fr, bsc@crhea.cnrs.fr, cmgb@crhea.cnrs.fr, drk@crhea.cnrs.fr, eln@crhea.cnrs.fr, falquier@univ-tours.fr, gmichaud@univ-tours.fr **Present address at ASM Belgium NV, Kapeldreef 75, 3001 Leuven, Belgium Keywords: CMUT transducer, epitaxial layer, Si(110), 3C-SiC(111), Si selective growth, thermal annealing.
Thus, we propose in this work to consider a 3C-SiC/Si/3C-SiC heterostructure on a Si(100) substrate as a base platform for designing a SiC-based CMUT structure.
Schematic workplan for SiC/Si/SiC/Si heterostructure elaboration, base structure of a CMUT device.
The 20x20µm² square shaped structures, linked by rectangular areas, observed on the SEM images correspond to the initial 3C-SiC(100) windows.
According to the large dependence of the selective character on the experimental parameters for the Si on Si case (pressure, chemistry employed for the growth, geometry of the patterns…) our results cannot definitely state the most critical parameters for achieving the selectivity.

Experiment research for fracture toughness of PAN-based carbon fibers Boming Zhanga Yufen Wub Center for Composite Materials and Structures, Harbin Institute of Technology Harbin 150001, China azbm@hit.edu.cn,bwuyf0913@163.com Keywords: Carbon fibers, Mechanical properties, Fracture toughness, Scanning electron microscopy Abstract.
This assumption, however, may not be self-evident, because PAN-based carbon fiber basically contains a turbostratic carbon structure in which many interlinking crystallites exist between crystallite ribbons enclosing pores [6], the in-plane Young’s modulus of a pyrolytic carbon film, in which the basal planes of turbostratic carbon crystallites are preferentially parallel to the surface, is representatively 50GPa [7], whereas the axial Young’s modulus of the T800H carbon fiber is 293GPa.
And with the Griffith(Irwin’s) relation between tensile strength and size of a sharp edged crack , the parameters of T300 and T800 were found to be approximate to 1.13MPam1/2, through the value was only estimation by the strength-mirror size relation , which could also give some advice on the fracture research of the composite structure analysis.
Bokros: Deposition, structure, and properties of pyrolytic carbon.
PL, editor, Chemistry and physics of carbon, vol. 5, New York: Marcel Dekker, (1969), p. 1 [8] M.

Ti3SiC2 has a hexagonal crystal structure consisting of double layers of TiC octahedral separated by a planar Si layer.
Recent band structure calculations indicate that ionic, covalent, and metallic bonds coexist within the structure.
This combination of properties and crystal chemistry has led to many interesting applications of the material.
The Ti3SiC2 phase however can be identified from the laminate layer structure.