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Hard Aluminium Anodising of Large Parts

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Light hearted but useful discourse covers tolerances, hardness, abrasion & corrosion resistance, dielectric strength, thermal resistivity (insulation), coefficient of friction. Problems &troubleshooting for racking, burning, corner defects, loss of strength, chemical attack & non-uniform coating. Design considerations, specifications, alloy selection (table lists these), coating thickness, dimensioning, surface finishes. Photos of ca 2 metre diameter tyre mould & rubber transfer plate.

Hard Aluminium Anodising Process using Lignin

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Anodising sol'n includes a lignin or lignosulphonate salt

Hard Aluminium Low Voltage Anodising with Superimposed Alternating Current

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Offers relatively low acid concentrations & higher than normal temperatures, AC superimposed on DC. Proprietary additive SANFRAN is also disclosed.

Hard amorphous carbon layers in mechanical applications

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Vacuum coated carbon can exhibit the hardness of diamond & the lubricity of graphite. Use of diamond-like carbon (DLC) films over metals to impart hardness while retaining ductility of metal core is examined, suggesting that the process will compete with PVD or CVD deposition of metal nitrides.

Hard amorphous CSi(x)N(y) thin films deposited by RF nitrogen plasma assisted pulsed laser ablation of mixed graphite/Si3N4-targets

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C-Si-N thin films were grown on (100) oriented Si substrates by pulsed laser deposition (PLD) assisted by RF nitrogen plasma source. Up to c. 30 at.% N2 and 20 at.% Si were found in hard amorphous thin films depending on composition of mixed graphite/Si3N4-PLD target. Due to incorporation of 10% Si3N4 to PLD graphite target CSi(x)N(y) films show slightly increased hardness of 23 GPa (at 0.1 mN load force, reference value for Si substrate 14 GPa), increased plastic hardness (67 instead of 61 GPa), but decreased elastic modulus from 464 to 229 GPa compared to corresponding C-N film without Si. Internal compressive stress of CSi(x)N(y) films showed max. of 5.5 GPa < 50 nm and decreased down to c. 1.5 GPa for film thickness > 100 nm. Increasing carbon double and triple bonding of the CSi(x)N(y) films in dependence on deposition process as identified by FTIR and Raman spectroscopy correlates with decreasing nanohardness. Results demonstrate capability of plasma assisted PLD process to deposit hard amorphous CSi(x)N(y) films with variable chemical binding structure and corresponding mech. properties.

Hard and abrasion resistant surfaces protecting cathode blocks of aluminium electrowinning cells

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Surface of carbon body, cathode block in Al electrowinning cells, is hardened by adding layer(s) containing particulate refractory hard metal boride and C-free bonding material which when C body is heated, reacts with refractory hard metal boride, as well as C from surface of C body or from C-containing atmosphere.

Hard and decorative anodising of aluminium components

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Brief review of anodising plant for Yugoslav appliance manufacturer.

Hard and Hybrid Coatings for Cutting, Forming Tools, and Surface Engineered Components

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SURF Performance and limitation of hybrid PECVD (hard coating)-PVD magnetron sputtering (Molybdenum disulphide-titanium composite) coated inserts tested for dry high speed milling of steel and grey cast iron. Investigating ion nitriding for the reduction of dissolution and soldering in die-casting shot sleeves. Performance of new AlTiN (aluminium titanium nitride) coatings in dry and high speed cutting. Deposition, characterization and machining performance of multilayer PVD coatings on cemented carbide cutting tools. Composite coating materials for the moulding of diffractive and refractive optical components of inorganic glasses.

Hard and more wear-resistant

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Casting machines in foundries make severe demands on the mould surfaces. Overview lists 4 grades of steel and a range of CVD, PA-CVD, DLC, hard chromium electroplate, nickel-phosphorus (electroless or electrolytic) with composite as diamond or ptfe, thermal sprayed coatings, armoured coatings, weld-surfacing. Lit. refs on request.

Hard and Multifunctional Nano-Structured Coatings.

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SURF Design Criteria for Wear-Resistant Nanostructured and Glassy-Metal Coatings. Temperature Dependence of Structure and Mechanical Properties of Ti-Si-N Coatings. Microstructure and Mechanical Behavior of TiAlCrN Multilayer Thin Films. Calorimetric Evidence for Frictional Self-Adaptation of TiAlN/VN Superlattice Coatings. PACVD Ti nitride/Ti-B-N Multilayers: From Micro- to Nano-Scale.

Hard and smooth aluminium anodised coatings at elevated bath temperatures

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Anodizing soln. containing H2SO4 200-220, oxalic acid 2-4 g/l, has been used to produce thick, smooth coatings at temps. up to 20°C, provided rectifiers with adequate voltage are available. Voltage increases non-linearly with coating thickness at constant cd, but the higher applied voltage, the lower the temp., the higher the cd and alloy constituent content.

Hard and superhard TiAlBN coatings deposited by twin electron-beam evaporation.

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Hard and superhard Zr-Ni-N nanocomposite films

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Hard and Wear-Resistant Titanium Nitride Films for Ceramic Cutting Tools by Pulsed High Energy Density Plasma

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Hard anodic coating for magnesium alloys

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Possibly Tagnite technology.