Abstract:
Polycrystalline diamond compacts for use in artificial joints achieve reduced corrosion and improved biocompatibility through the use of solvent metal formulations containing tin and through the control of solvent metal pore size, particularly in inner layers of the compact. Solvent metal formulations containing tin have been discovered which provide sintering ability, part strength, and grind resistance comparable to levels achieved by using CoCrMo solvent metals. It has been discovered that limiting the solvent metal pore size in the diamond layers minimizes or eliminates the occurance of micro cracks in the solvent metal and significantly reduces the corrosion of the compact as manifested by the release of heavy metal ions from the compact. Polycrystalline diamond compacts which utilize both the solvent metal formulations containing tin and the control of pore sizes achieve significantly reduced corrosion and improved biocompatibility compared to prior art polycrystalline diamond compacts.
Abstract:
Die vorliegende Erfindung betrifft ein Schichtsystem zur Beschichtung einer Substratoberfläche sowie ein Verfahren zur Beschichtung einer Substratoberfläche mit einem entsprechenden Schichtsystem, wobei das Schichtsystem aus wenigstens zwei Schichten besteht, wobei eine Schicht eine Metall-Nickel-Legierungsschicht mit einem Metall der Gruppe bestehend aus Zinn, Kupfer, Eisen, Wolfram und Kobalt oder einer Legierung wenigstens eines dieser Metalle und die andere Schicht eine Schicht eines Metalls der Gruppe bestehend aus Nickel, Kupfer, Zinn, Molybdän, Niob, Kobalt, Chrom, Vanadium, Mangan, Titan und Magnesium, oder einer Legierung wenigstens eines dieser Metalle ist. Das erfindungsgemäße Schichtsystem zeichnet sich durch eine hohe mechanische Stabilität und große Korrosionsbeständigkeit aus.
Abstract:
A lead-free solder composition (12) for soldering onto a substrate includes a solder having tin and silver; and additive (14) having a low coefficient of thermal expansion.
Abstract:
A solder not containing lead (a lead-free solder) contains zinc and tin, and also contains 5 weight percent or less nickel and 0.5 weight percent or less aluminum with a liquid phase temperature of 260 degrees C or greater. In addition, a lead-free solder has a liquid phase temperature of 260 degrees C or greater, and contains 30 to 70 weight percent zinc, 5 weight percent or less nickel, and the remaining weight percent tin. Moreover, a joint is manufactured using these lead-free solders. As a result, a lead-free solder and a lead-free joint having excellent electrical characteristics but not including harmful substances, can be provided.
Abstract:
The invention relates to a pyrophosphoric acid bath for use in cyanogen-free copper-tin alloy plating that contains an additive (A) composed an amine derivative, an epihalohydrin and a glycidyl ether compound with ratios of epihalohydrin to glycidyl ether compound being 0.5-2 to 0.1-5 on mol basis, per 1 mol of the amine derivative, has a pH of 3 to 9, and optionally contains an additive (B) composed of an organic sulfonic acid and/or an organic sulfonic acid salt, and to a copper-tin alloy coating obtainable by using the bath. The invention provides a pyrophosphoric acid bath for use in copper-tin alloy plating of the cyanogen-free type utilizable on an industrial scale, particularly, capable of performing uniform treatment to exhibit low defective product generation rates even with the current density being incessantly changing between a high state and a low state, as a barrel plating method, and a copper-tin alloy coating obtainable by using the bath.