3,773 research outputs found
Complexes of Some Group(IV) Metal Halides with 5-Aminoindazole
The synthesis and characterisation of Sn(IV) halides, Ge(IV),
Ti(IV) and Zr(IV) chloride complexes of the type MX4 : Li_ 2 with
5-aminoindazole has been made. The possible structure of these
complexes has been proposed on the basis of elemental analysis
and infrared spectroscopy. The IR spectra suggest unidentate
behaviour of the ligand involving pyrrole nitrogen in all the cases
except the tin(IV) bromide complex, where the ligand exhibits its
bidentate nature, involving the pyridyl nitrogen. An octahedral
geometry has been proposed for all the complexes. In the case
of MX4 :\u27L type complexes, except for SnBr4 : L, an octahedral
halogen bridged structure has been proposed
Complexes of manganese(III) oxychlorosulphate with some nitrogen bases
717-718Manganese(III) oxychlorosulphate complexes of the type MnOSO3.Cl.L2 and MnOSO3Cl.L’ with monodentate (aniline, biphenyl amine, acetonitrile, pyridine, 3-amino-2-chloropyridine, 4-cyanopyridine, acridine) and bidentate ligands (2,2-bipyridyl and 1,10-phenanthroline) have been characterized on the basis of their elemental analysis, molar conductance, magnetic susceptibility measurements, infrared and electronic spectral data. These studies, corroborate the tridentate nature and lowering of C3v symmetry of the chlorosulphate group. The com lexes are of high-spin octahedral type as evidenced by agnetic moment values and electronic spectral bands
Pentacoordinated Ti(IV) Chloride & Sn(IV) Bromide & Iodide Complexes with Acridine & Piperazine
209-21
The sintering temperature effect on the shrinkage behavior of cobalt chromium alloy
Problem Statement: Co-Cr based alloys which is well known for its high Young’s
modulus, fatigue strength, wear resistance and corrosion resistance is an important metallic bio�material. However, till date there are only two type of Co-Cr alloy which are the castable and wrought
cobalt alloy. Powder Metallurgy route for cobalt is expected to give better result of Co-Cr alloy. The
purpose of this research was mainly to study the sintering temperature effect to the shrinkage
behavior of Cobalt Chromium (Co-Cr) alloy of the powder metallurgy route. Approach: Co-Cr was
produced following P/M route under sintering temperature of 1000, 1100, 1200, 1300 and 1400oC.
The sintering time was fixed at 60 min. Several tests has been conducted to determine this effect such
as the rate of shrinkage measurement, the bulk density and porosity percentage measurement,
compression and hardness tests and micro structural study. Result: From the study, it was found that
the sintering temperature has caused the shrinkage of Co-Cr. The increasing of the sintering
temperature has caused to the increasing of shrinkage of Co-Cr. This has resulted to the reduction of
the pore volume and hence increased it density. In conjunction to that, the strength and the hardness
of Co-Cr was increased. Conclusion: Therefore, it is hope that it will bring new view of powder
metallurgy Co-Cr alloy as bio-material
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