Enhancement of Hard Disk Drive Performance by Using Thin Titanium Foil Disk Substrates

2013 ◽  
Author(s):  
Anil Nigam ◽  
James White
Keyword(s):  
Low Voltage ◽  
Pure Titanium ◽  
Form Factors ◽  
Hard Disk ◽  
Disk Drive ◽  
Titanium Foil ◽  
Commercially Pure Titanium ◽  
Battery Power ◽  
Commercially Pure ◽  
Titanium Substrates

In this paper an experimental study is reported to reduce the rotating inertia in a 2½″ HDD by replacing thick hard disk platters with thin, CP (commercially pure) titanium substrates in the range of 25 microns to 152 microns in thickness. The results of this work can be extended to other disk form factors [1]. The low inertia and thinness of the titanium foil platter can be exploited to allow disk drive products to be powered on/off rapidly, decreasing energy consumption. In addition, significantly faster rpms and data thru-put can be achieved. Also, many more disk platters can be housed in each unit, increasing storage capacity; while slimmer products that operate with low voltage battery power can be developed.

Laser Microdrilling and Anodic Oxidation of Titanium for the Manufacturing of a Wettability Controlled Microvalve With UV/Dark Actuation

2010 ◽  
Author(s):  
Ali Go¨khan Demir ◽  
Barbara Previtali ◽  
Massimiliano Bestetti
Keyword(s):  
Pressure Drop ◽  
Uv Light ◽  
Pure Titanium ◽  
Contact Angles ◽  
Titanium Foil ◽  
Commercially Pure Titanium ◽  
Tio2 Layer ◽  
Commercially Pure ◽  
Capillary Pressures ◽  
Actuation Method

Capillary pressures due to the wetting behaviour of a liquid on a material can be exploited to control the pressure drop of the liquid into microchannels. The pressure can be estimated by the Young-Laplace equation and for a given liquid, high values can be achieved by having small microchannel diameters and high wetting contact angles. An original actuation method for a microvalve can be derived from this, if reversible wettability behaviour can be achieved, i.e. the switching between hydrophobic to hydrophilic states implies that the microvalve can be turned on and off. In the present work a wettability controlled microvalve with UV/dark actuation is proposed. The valve microchannels are obtained by laser microdrilling on commercially pure titanium foil. Then the drilled titanium foil is anodic oxidized to grow on the microchannel surfaces a nanostructured TiO2 layer, which exhibits reversible wettability behaviour upon the alternate application of UV and darkness. Finally, the concept is demonstrated in a prototype microvalve controlled between OFF and ON states by UV light application.

Calcium Phosphate Films Coated on Titanium by RF Magnetron Sputtering for Medical Applications

2007 ◽  
Vol 539-543 ◽  
pp. 551-556 ◽  
Author(s):  
Takayuki Narushima ◽  
Kyosuke Ueda ◽  
Takashi Goto ◽  
Tomoyuki Katsube ◽  
Hiroshi Kawamura ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Magnetron Sputtering ◽  
Calcium Ion ◽  
Pure Titanium ◽  
Rf Magnetron Sputtering ◽  
Titanium Implants ◽  
Apatite Formation ◽  
Commercially Pure Titanium ◽  
Commercially Pure ◽  
Titanium Substrates

Calcium phosphate films were coated on commercially pure titanium substrates by radiofrequency magnetron sputtering using β-tricalcium phosphate targets. The films consisted of amorphous calcium phosphate and oxyapatite phases. Immersion tests of the films were carried out in Hanks’ solution and PBS(-), and apatite formation and calcium ion elution from the films were investigated. The titanium cylinders coated with calcium phosphate films were implanted into the mandibles of beagle dogs. These results suggest that coating with calcium phosphate improves the biocompatibility of titanium implants with bone tissue.

RMI 0.2% Pd

Alloy Digest ◽  
1979 ◽  
Vol 28 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Crevice Corrosion ◽  
Elevated Temperatures ◽  
Pure Titanium ◽  
Heat Treating ◽  
Low Ph ◽  
Commercially Pure Titanium ◽  
Bend Strength ◽  
Commercially Pure ◽  
Minimum Yield

Abstract RMI 0.2% Pd is a grade of commercially pure titanium to which up to 0.2% palladium has been added. It has a guaranteed minimum yield strength of 40,000 psi with good ductility and formability. It is recommended for corrosion resistance in the chemical industry and other places where the environment is mildly reducing or varies between oxidizing and reducing. The alloy has improved resistance to crevice corrosion at low pH and elevated temperatures. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ti-74. Producer or source: RMI Company.

UPM CP TITANIUM GRADE 3 (UNS R50550)

Alloy Digest ◽  
2020 ◽  
Vol 69 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Pure Titanium ◽  
Heat Treating ◽  
Commercially Pure Titanium ◽  
Commercially Pure ◽  
Continuous Service ◽  
Pure Grade ◽  
Grade 3 ◽  
Titanium Grade ◽  
Design Stress

Abstract UPM CP Titanium Grade 3 (UNS R50550) is an unalloyed commercially pure titanium that exhibits moderate strength (higher strength than that of Titanium Grade 2), along with excellent formability and corrosion resistance. It offers the highest ASME allowable design stress of any commercially pure grade of titanium, and can be used in continuous service up to 425 °C (800 °F) and in intermittent service up to 540 °C (1000 °F). This datasheet provides information on composition, physical properties, and elasticity. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-167. Producer or source: United Performance Metals.

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