Thermal, spectroscopic and kinetic characterization of reaction products of copper(II) chloride with photoproducts of octacyanocomplexes of Molybdenum(IV) and Tungsten(IV) with ethylenediamine

Fiber reinforced titanium alloys hold immense potential for applications in the aerospace industry. However, chemical reaction between the fibers and the titanium alloys at fabrication temperatures leads to the formation of brittle reaction products which limits their development. In the present study, coated SiC fibers have been used to evaluate the effects of surface coating on the reaction zone in the SiC/IMI829 system.IMI829 (Ti-5.5A1-3.5Sn-3.0Zr-0.3Mo-1Nb-0.3Si), a near alpha alloy, in the form of PREP powder (-35 mesh), was used a茸 the matrix. CVD grown AVCO SCS-6 SiC fibers were used as discontinuous reinforcements. These fibers of 142μm diameter contained an overlayer with high Si/C ratio on top of an amorphous carbon layer, the thickness of the coating being ∽ 1μm. SCS-6 fibers, broken into ∽ 2mm lengths, were mixed with IMI829 powder (representing < 0.1vol%) and the mixture was consolidated by HIP'ing at 871°C/0. 28GPa/4h.

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Microstructural and fractographic characterization of B4C-Al cermets tested under dynamic and static loading

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100154780 ◽

1989 ◽

Vol 47 ◽

pp. 562-563

Author(s):

Gyeung Ho Kim ◽

Mehmet Sarikaya ◽

D. L. Milius ◽

I. A. Aksay

Keyword(s):

Thin Film ◽

Mechanical Properties ◽

Fracture Toughness ◽

Static Loading ◽

Carbon Deposition ◽

Full Density ◽

Unique Combination ◽

Strong Component ◽

Reaction Products

Cermets are designed to optimize the mechanical properties of ceramics (hard and strong component) and metals (ductile and tough component) into one system. However, the processing of such systems is a problem in obtaining fully dense composite without deleterious reaction products. In the lightweight (2.65 g/cc) B4C-Al cermet, many of the processing problems have been circumvented. It is now possible to process fully dense B4C-Al cermet with tailored microstructures and achieve unique combination of mechanical properties (fracture strength of over 600 MPa and fracture toughness of 12 MPa-m1/2). In this paper, microstructure and fractography of B4C-Al cermets, tested under dynamic and static loading conditions, are described.The cermet is prepared by infiltration of Al at 1150°C into partially sintered B4C compact under vacuum to full density. Fracture surface replicas were prepared by using cellulose acetate and thin-film carbon deposition. Samples were observed with a Philips 3000 at 100 kV.

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Characterization of dissolved material during the initial phase of softwood kraft pulping

TAPPI Journal ◽

10.32964/tj12.1.37 ◽

2013 ◽

Vol 12 (1) ◽

pp. 37-43 ◽

Cited By ~ 1

Author(s):

HANNU PAKKANEN ◽

TEEMU PALOHEIMO ◽

RAIMO ALÉN

Keyword(s):

Mass Transfer ◽

Molecular Mass ◽

Initial Phase ◽

Degradation Products ◽

Kraft Pulping ◽

Reaction Products ◽

Cooking Temperature ◽

Molecular Masses ◽

Aliphatic Carboxylic Acids

The influence of various cooking parameters, such as effective alkali, cooking temperature, and cooking time on the formation of high molecular mass lignin-derived and low molecular mass carbohydrates-derived (aliphatic carboxylic acids) degradation products, mainly during the initial phase of softwood kraft pulping was studied. In addition, the mass transfer of all of these degradation products was clarified based on their concentrations in the cooking liquor inside and outside of the chips. The results indicated that the degradation of the major hemicellulose component, galactoglucomannan, typically was dependent on temperature, and the maximum degradation amount was about 60%. In addition, about 60 min at 284°F (140°C) was needed for leveling off the concentrations of the characteristic reaction products (3,4-dideoxy-pentonic and glucoisosaccharinic acids) between these cooking liquors. Compared with low molecular mass aliphatic acids, the mass transfer of soluble lignin fragments with much higher molecular masses was clearly slower.

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SPECTROSCOPIC CHARACTERIZATION OF THE REACTION PRODUCTS BETWEEN HCl AND THE SIMPLEST CRIEGEE INTERMEDIATE CH2OO

Proceedings of the 72nd International Symposium on Molecular Spectroscopy ◽

10.15278/isms.2017.mj01 ◽

2017 ◽

Author(s):

Carlos Cabezas ◽

Yasuki Endo

Keyword(s):

Spectroscopic Characterization ◽

Reaction Products

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Faculty Opinions recommendation of Spectroscopic and kinetic characterization of active site mutants of Desulfovibrio fructosovoransNi-Fe hydrogenase.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1012180.184667 ◽

2003 ◽

Author(s):

Michael Maroney

Keyword(s):

Active Site ◽

Kinetic Characterization ◽

Active Site Mutants

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Kinetic Characterization of Anticarsia gemmatalis Digestive Serine- Proteases and the Inhibitory Effect of Synthetic Peptides

Protein and Peptide Letters ◽

10.2174/0929866524666170918103146 ◽

2018 ◽

Vol 24 (11) ◽

Cited By ~ 1

Author(s):

Adriana M. Patarroyo-Vargas ◽

Yaremis B. Merino-Cabrera ◽

Jose C. Zanuncio ◽

Francelina Rocha ◽

Wellington G. Campos ◽

...

Keyword(s):

Synthetic Peptides ◽

Serine Proteases ◽

Inhibitory Effect ◽

Anticarsia Gemmatalis ◽

Kinetic Characterization

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Hydrogenolytic cleavage of pyridine on different cobalt-molybdenum and nickel-tungsten catalysts

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19811348 ◽

1981 ◽

Vol 46 (6) ◽

pp. 1348-1354 ◽

Cited By ~ 2

Author(s):

Mirko Černý ◽

Miloš Kraus

Keyword(s):

Reaction Products ◽

Hydrogenation Activity ◽

Catalyst Composition ◽

Tungsten Catalysts ◽

Nickel Tungsten ◽

And Tungsten

Composition of the reaction products formed by hydrogenation of pyridine at 300 °C and 15 MPa in the presence of 15 sulphided and unsulphided molybdenum and tungsten catalysts promoted by cobalt and by nickel, respectively, using alumina as the support in most cases, has been examined. It has been proved that the catalyst composition affects both its hydrogenation activity and the ratio of transalkylation to cracking (or hydrocracking) reactions. Relations between the catalyst composition and its activity and selectivity found for the reaction of pyridine differ from those reported for hydrogenolytic cleavage of thiophene, hydrogenation and isomerization of cyclohexene.

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