Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: November 2012
Authors: Jai Dev Singh Chandel, Nand Lal Singh
Claims made for the advantages of particular structures are not always substantiated, and mixed ferrite-bainite-martensite structures often perform as well as single types.
The low ‘C’ chemistry results in a high toughness for the degenerate upper bainite (DUB) microstructure and reduces the maximum hardness.
During the study different chemistry wires have been studied and chemistry of the experimental wires is shown in the Table 2.
The root run with GMAW (chemistry shown in table 1) and one pass of SAW from one side and second pass of SAW from the other side (i.e. root side) of the test coupon.
Figure 4 TEM Micrographs showing (a, b) Lath type/Bainitic Ferrite Structure and (c) Lath Martensite L – 11 Figure 5 TEM Micrographs Showing Bainitic Ferrite with High Dislocation Density (L-11) Figure 6 TEM Micrographs Showing Bainitic / Martensite Structure.
Online since: October 2012
Authors: Jin Li Du, Xin Hua Deng, Yuan Sun
Research shows that ZrO2 filled with some of divalent or trivalent oxides can stabilize the phase structure[11].
The reason for the phenomenon can be attributed to nodes and network fiber structure to withstand the role of mechanical stretch in the drawing process.
[6] C.Z.Liu, J.Q.Wu, Q.L.Ren, J.Tong, J.Q.Li, N.Cui, N.M.D.Brown and B.J.Meenan, Materials Chemistry and Physics, 85, 340(2004),pp.587-580
[7] K.P.Murali, S.Rajesh, O.Prakash, A.R.Kulkarni and R.Ratheesh, Materials Chemistry and Physics, 113, 290(2009) ,pp. 290-295
Journal of Fluorine Chemistry, 129, 654(2008) pp. 654-657
Online since: July 2011
Authors: Li Na Liu, Xiu Li Han, Chang Cun Li, Run Ming Feng
The lubrication and heat transfer can be controlled by the ore phase structure of slag film in the mould powder, the structure also has an important influence on casting blank diastema and bond breakout.
The power′s chemistry components(%) and physical-chemistry properties are showed in table1.
Table1 Chemistry components(%) and physical-chemistry properties of powder sample SiO2 Al2O3 Fe2O3 CaO MgO K2O Na2O F- B2O3 R Melting piont(℃) Viscosity (Pa·s) A# 31.2 4.85 2.17 29.40 — — — — — 0.94 1100 0.28 B# 34.52 5.08 0.96 27.44 2.68 — 9.9 6.18 — 0.8 1075 0.29 C# 32.95 2.88 0.62 30.44 3.12 0.47 10.7 7.22 — 0.92 1075 0.102 D# 30.60 3.41 — 29.86 6.12 — 9.88 5.84 2.84 0.98 1045 0.128 Because of the interference of carbonaceous material, so first of all, get rid of the carbon from the mould powder in high-temperature box resistance furnace at the temperature of 800℃, then make the decarbonized mould powder into polished thin section, observe the mineral component ore phase structure of mould powder and slag film under light-microscope(Axioskop 40A pol).
Most of the melilite is formed as head to head structure, the grain size generally is 0.026mm.
The melilite is formed as feathery, interwoven and head to head structure, and the grain size is 0.56mm to 1.51mm, corrosion structure can be seen in local.
Online since: October 2013
Authors: Sándor Kiss
Norton Vitrium3 – Revolutionary Grain Adhesion Sandor Kiss1, a 1 Saint-Gobain Construction Product Hungary Kft Abrasives Division H-2085 Bécsi str. 07/5 Pilisvörösvár Hungary a sandor.kiss@saint-gobain.com Keywords: Norton, Quantum, abrasive, grain, bond, hardness, structure, system, Saint-Gobain Abstract.
Figure 2, Micro-crystalline (SG) ceramic structure [1] One of the most important advantage of ceramic grain is increasing of life time is possible because decreasing frequency of dressing and increasing depth of dressing (recommended 0,01 mm).
Figure 3, Quantum structure [2] Quantum has fine crystal size that provides hardness, and there are 2nd phase particles which provide friability.
Saint-Gobain Patented Figure 4, Quantum grain [2] VITRIUM3 – Reshaping the World of precision grinding This revolutionary bond platform features an exclusive chemistry that delivers an entirely new grain adhesion science, resulting in improved product versatility across a wide range of precision grinding applications.
The chemistry of holding the abrasive grain in the bond matrix for the precise amount of time is referred to as “grain adhesion science”.
Online since: April 2020
Authors: Thapanee Sarakonsri, Naruephon Mahamai
The X-ray diffraction (XRD) patterns displayed their alloy phase of PtMRu (M = Au, Sn) which compose of Pt main structure and NrGO supporter.
Pure Pt is not enough for ethanol oxidation reaction (EOR), Au and Ru were added into Pt structure[7].
The shift of XRD peaks in the pattern of trimetallic alloy particles causes by the expansion of Pt main unit cell structure.
Insight from Experiments and Calculations, The Journal of Physical Chemistry C, 120 (2016) 11590-11597
Hupka, Preparation of silver nanoparticles with controlled particle size, Procedia Chemistry, 1 (2009) 1560-1566
Online since: November 2012
Authors: Yong Xiang Dong, Shun Shan Feng, Shun Ping Li, Yun Chen
Based on one-dimensional shock wave, thermodynamics and physical chemistry theory, mathematical analysis model of impact explosive temperature vs. mass ratio of the reactive material is established.
From the view of shock wave, thermodynamics and physical chemistry, mathematical analysis model of the impact explosive temperature is proposed.
Taking PTFE/Al composite structure materials as the research object and under some assumptions, shock wave occurs at the contact area when the material impacts with a metal target, as for the material shell:
Conclusion Based on one-dimensional shock wave, thermodynamics and physical chemistry theory, mathematical analysis model of impact explosive temperature vs. mass ratio of the reactive material is established.
Online since: April 2005
Authors: Pavel Lejček, Vaclav Paidar
Due to short-range stress field their influence is primarily based on their atomic structure.
All those aspects of boundary behaviour are strongly influenced by the boundary chemistry including various segregation phenomena.
Structure, energy and fracture stress were systematically studied on molybdenum bicrystals [4-7].
Grain Boundary Chemistry Grain boundaries with their atomic configurations differing form the prefect crystal can become the weakest link of material microstructure.
The attention was focused on the chemistry, mobility and fracture properties of not only symmetrical grain boundaries.
Online since: September 2013
Authors: Li Bin Yang, Zun Lu Zhu, Zuo Liang Sha
Indeed, when TS-1 membrane was deposited on a porous cordierite based support, the structure-directing agent (SDA) may strongly impact the morphology and crystal size.
Attenuated Total Reflectance Fourier transform Infrared (ATR-FT-IR) spectra was used to characterize components and structure.
Fig 2 also showed all the samples had the characteristic peaks (2θ=7.9°, 2θ=8.89°, 2θ=23.29°, 2θ=23.89°, 2θ=24.49°) of MFI structure.
It was indicated that they had the same MFI structure, and the similar XRD pattern will be obtained.
[6] Naijia, Guan, Yansong Han Chemistry Letters 2000 1084-1085
Online since: January 2013
Authors: Gou Sheng Liu, Yue Long Liu
By studying the the structures of intermediates, the reaction process and reaction mechanism can thus be understood.
Journal of Agriculture and Food Chemistry, Vol. 24,(1976), p.412
Journal of Agriculture Food Chemistry, Vol. 27,(1979), p. 612
Industrial Engineering & Chemistry Research.
Industrial Engineering & Chemistry Research.
Online since: February 2014
Authors: Rui Sheng Hu, Chun Li, Nan Lin Zhu, Jia Jia Shi
A novel Bi-based photocatalytic material for the degradation of organic pollutants under visible light Nanlin Zhu1,a, Jiajia Shi1,b, Ruisheng Hu1,c, Chun Li1,d 1Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China Corresponding author.
The preparation, structure and photocatalytic activity of Bi2O3 Bi2O3 is a semiconductor functional material with good catalytic activity, it mainly have four crystal forms α, β, γ, σ.
Table 1 Crystal structure, average crystal size, specific surface area and electron combining energy of Bi2O3 photocatalysts prepared by different methods and calcined at 750 oC.
John, Wuzong Zhou, et al: Journal of Solid State Chemistry Vol. 72 (1988), p. 126- 130
[7] Junzhen Wang, Xixian Fu, Quhua Yang, et al: Chinese Journal of Applied Chemistry Vol. 19 (2002), p. 483- 485, in Chinese