Effect of Cobalt Metal on the Microstructure of Titanium Foam

Titanium—aluminum, titanium—foam aluminum composites and bimetals obtained by liquid-phase methods, are increasingly used in industry. At the liquid-phase methods as result of the reaction diffusion of titanium and aluminum is formed transitional intermetallic layer at the phase boundary of the composite, which reduces the mechanical properties of titanium and composite. To reduce the growth rate of the intermetallic layer between the layers of the composite and increase its mechanical properties, it is proposed to alloy aluminum melt with nickel. The studies of the interaction of titanium and molten aluminum alloyed with nickel made it possible to establish the effect of temperature and aluminizing time on the thickness, chemical and phase compositions of the transition intermetallic layer. The tests showed the effect of the temperature of the aluminum melt, the nickel concentration on the strength properties of titanium—aluminum bimetal.

Download Full-text

Plasma-engineered bifunctional cobalt–metal organic framework derivatives for high-performance complete water electrolysis

Nanoscale ◽

10.1039/d1nr00317h ◽

2021 ◽

Vol 13 (12) ◽

pp. 6201-6211

Author(s):

Wenxia Chen ◽

Wei Wei ◽

Kefeng Wang ◽

Nan Zhang ◽

Guangliang Chen ◽

...

Keyword(s):

High Performance ◽

Metal Organic Framework ◽

Water Electrolysis ◽

Plasma Discharge ◽

Rf Plasma ◽

Cobalt Metal ◽

Simultaneous Oxidation ◽

Rf Plasma Discharge ◽

Metal Organic ◽

Organic Framework

A MOF-derived CoPO hollow polyhedron structure is designed by simultaneous oxidation/phosphatization processes during Ar–N2 RF plasma discharge.

Download Full-text

Controllable Adsorption of Cobalt Metal Ions on Cotton Fabrics and Their Carbonised Oxygen Electrocatalysts

Electrocatalysis ◽

10.1007/s12678-021-00677-4 ◽

2021 ◽

Author(s):

Shan Jiang ◽

Yanbo Liu ◽

Jian Fang

Keyword(s):

Metal Ions ◽

Cotton Fabrics ◽

Cobalt Metal

Download Full-text

Microbacterium sp. MRS-1, a potential bacterium for cobalt reduction and synthesis of less/non-toxic cobalt oxide nanoparticles (Co3O4)

Beni-Suef University Journal of Basic and Applied Sciences ◽

10.1186/s43088-020-00070-y ◽

2020 ◽

Vol 9 (1) ◽

Author(s):

Sathyavathi Sundararaju ◽

Manjula Arumugam ◽

Prakash Bhuyar

Keyword(s):

Heavy Metal ◽

Cobalt Oxide ◽

Metal Oxide Nanoparticles ◽

Industrial Effluent ◽

Industrial Applications ◽

Resistant Bacterium ◽

Oxide Nanoparticles ◽

Cobalt Metal ◽

Cobalt Oxide Nanoparticles ◽

Heavy Metal Resistant

Abstract Background Detoxification of heavy metal pollutants in wastewater has become a serious problem to surrounding environment. This research was conducted to utilize a potential heavy metal-resistant bacterium for the remediation of cobalt metal and simultaneous synthesis of cobalt oxide nanoparticles in the form of powder for various industrial applications. Metal oxide nanoparticles have great applications in electrochemical devices such as supercapacitors, biosensors, and batteries. Method A heavy metal-resistant bacterium Microbacterium sp. MRS-1 isolated from electroplating industrial effluent reduced cobalt ions from an initial concentration of 200 mg/L to 26 mg/L were analyzed by atomic absorption spectroscopy. Instrumental analysis of bacterially synthesized Co3O4 has been characterized. Cytotoxicity of synthesized nanoparticles was assessed by MTT assay. Results Microbacterium sp. MRS-1 isolated from electroplating industrial effluent was found to be suitable for cobalt oxide nanoparticles as it showed tolerance towards high concentration of metal. The nutrient broth containing metal solution and Microbacterium sp. MRS-1 showed color change from light pink to dark pink indicated the formation of extracellular nanoparticles. It also converted soluble cobalt salts into less soluble cobalt oxide nanoparticles outside the cell which allows easy recovery of nanoparticles without the destruction of cells and simultaneous detoxification of toxic metal ions. Electron microscopic imaging verified that nanoparticles were predominantly surrounding the bacterial cells and SEM imaging revealed that the produced particles were in the range of 10–100 nm in size. XRD spectrum exhibited 2θ values were corresponding to cubic face-centered cobalt oxide (Co3O4) nanoparticles. Conclusion The present study investigated new prospective for eco-friendly detoxification of toxic heavy metal Co from metal-polluted sites and the production of cobalt oxide nanoparticles in powder form for clinical and other industrial applications.

Download Full-text

Neue Hochdrucksynthesen von bekannten und unbekannten Derivaten des Co2(CO)8 aus metallischem Kobalt / New High Pressure Syntheses of Known and Unknown Derivatives of Co2(CO)8 Starting from Cobalt Metal

Zeitschrift für Naturforschung B ◽

10.1515/znb-1977-1101 ◽

1977 ◽

Vol 32 (11) ◽

pp. 1217-1221 ◽

Cited By ~ 11

Author(s):

Helmut Behrens ◽

Rolf Hüller ◽

Anton Jungbauer ◽

Peter Merbach ◽

Matthias Moll

Keyword(s):

High Pressure ◽

Cobalt Metal ◽

Carbonyl Complexes ◽

Cobalt Carbonyl ◽

Derivatives Of

The following known and novel cobalt carbonyl complexes are formed by reactions of cobalt metal with bipy, phen, Ph2P-CH2-CH2-PPh2 (P͡P), PPh3, Ph2P-CH2-CH2-NEt2 (P͡N), InCl, SnX2 (X = Cl, Br, I), Cd and HgBr2 under CO pressure (200 bar):[Co(bipy)3][Co(CO)4]2, [Co(phen)3][Co(CO)4]2, [Co2(P͡P)3(CO)4][Co(CO)4]2; Co2(CO)6 (PPh3)2, Co2(CO)6 (P͡N)2; [Co(CO)4]2SnCl2, {[Co(CO)4]2InCl}2; [Co(CO)3PPh3]2SnX2(X = Cl, Br, I), [Co(CO)3(P͡N)]2SnCl2, [Co(CO)3(P͡N)]2M (M = Cd, Hg).

Download Full-text

The Modified Maquet Procedure (MMP) in Dogs: Technical Development and Initial Clinical Experience

Journal of the American Animal Hospital Association ◽

10.5326/jaaha-ms-6304 ◽

2016 ◽

Vol 52 (4) ◽

pp. 242-250 ◽

Cited By ~ 3

Author(s):

Malcolm Graham Ness

Keyword(s):

Cruciate Ligament ◽

Major Complication ◽

Tibial Tuberosity ◽

Radiographic Examination ◽

Computer Assisted ◽

Clinical Report ◽

Modified Technique ◽

Cranial Cruciate Ligament ◽

Titanium Foam

ABSTRACT The literature about tibial tuberosity advancement surgery in dogs and humans informed the development of a version of the operation using a wedge-shaped implant of titanium foam. Computer-assisted drawing and stereolithography was used to create instruments and implants that were evaluated by cadaver surgery. A trial, involving 26 client-owned dogs with lameness due to cranial cruciate ligament failure, was started. Follow-up was done by clinical and radiographic examination after 4 wk and clinical examination again 6–11 mo after surgery. The titanium foam implant maintained tibial tuberosity advancement easily and effectively. The same major complication occurred in 2 of the first 6 cases before, a slightly modified technique was used to treat 20 dogs without complication. At mid-term follow-up (6–11 mo), 20/26 dogs (77%) had returned to full function, two dogs (7.7%) had acceptable function, two dogs (7.7%) could not be evaluated due to recent contra lateral modified Maquet procedure surgery, and two (7.7%) dogs had died for reasons unrelated to the study. This is the first clinical report of the use of titanium foam in veterinary orthopaedics. Modified Maquet procedure appears to be an effective treatment for lameness due to failure of the cranial cruciate ligament in dogs.

Download Full-text

Porous Bioceramics (Open Cell Foams) Expanded in Vacuum

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.309-311.1023 ◽

2006 ◽

Vol 309-311 ◽

pp. 1023-1026

Author(s):

E.T. Uzumaki ◽

C.S. Lambert

Keyword(s):

Zirconium Oxide ◽

Cell Structure ◽

The Body ◽

Carbon Coatings ◽

Open Cell ◽

Glass Foam ◽

Open Cell Foams ◽

Titanium Foam ◽

Porous Bioceramics ◽

Scanning Electron

In this study, porous bioceramics (titanium foam with diamond-like carbon coatings, glass foam and zirconium oxide foam) were produced using expansion in vacuum. The porosity, the pore size and pore morphology can be adjusted in agreement with the application. The different 3D structures were obtained by varying the parameters of the process. The microstructure and morphology of the porous materials were observed by scanning electron microscopy (SEM) and optical microscopy. The foam exhibit an open-cell structure with interconnected macropores, which provide the potential for tissue ingrowths and the transport of the body fluids.

Download Full-text