Nippon Piston Ring Co., Ltd.

Saitama University

Iwate University

Yoshiki Ishikawa

Takasumi Kubo

Takashi Kawabata

Shunsuke Takeguchi

Hiroki Takahashi

Hiroshi Matsushima

Shin Ishida

Masafumi Morita

Masahito Miki

Yuki Kimura

Fujio Anzai

Hiroshi Horie

Toshinori Kowata

Toshio Nagase

A marker for use in a living body includes an indicator part to be placed in a living body for a predetermined period of time, and the indicator part is configured to indicate information on the living body or information on the indicator part by means of a difference in X-ray image. Thus, there are provided the marker for use in a living body and an instrument set for inserting the marker for use in a living body capable of identifying a predetermined site in a living body easily and accurately.

Marker for use in living body and instrument set for inserting marker for use in living body

A titanium alloy includes 15 to 27 atomic % (at %) of tantalum (Ta) and 0 to 8 at % of tin (Sn), the balance being titanium (Ti) and unavoidable impurities, when the entire 5 amount of the titanium alloy is taken as 100 at %. Therefore, the titanium alloy provided has characteristics suitable for medical device materials, biocompatible materials, etc.

Titanium alloy

There is provided an implant that is safe for the living body. An angular plate as the implant includes a bone supporting plate part and a blade part. The blade part is integrally formed with the bone supporting plate part, and extends from one end of the bone supporting plate part at a predetermined angle &#x3b1; (0&#xb0;&#x3c;&#x3b1;&#x3c;180&#xb0;) relative to the bone supporting plate part. The angular plate is formed from a titanium-tantalum-based alloy containing tin. The angular plate is preferably formed from a titanium-tantalum-based alloy containing tin in which a Young's modulus is decreased by increasing the reduction ratio thereof.

Implant and method for producing implant

A titanium alloy includes 15 to 27 atomic % (at %) of tantalum (Ta) and 0 to 8 at % of tin (Sn), the balance being titanium (Ti) and unavoidable impurities, when the entire amount of the titanium alloy is taken as 100 at %. Therefore, the titanium alloy provided has characteristics suitable for medical device materials, biocompatible materials, etc.

The invention provides a flake graphite cast iron being highly strong and excellent in workability such as cutting performance, which is suitable for use, for example, in internal combustion engine parts and the like, and a production method thereof without using a misch metal. Specifically, the flake graphite cast iron according to the invention includes an A-type graphite with a uniformly and disorderly distributed existence form without directionality; and has a chemical composition containing 2.8 to 4.0 mass % of C, 1.2 to 3.0 mass % of Si, 1.1 to 3.0 mass % of Mn, 0.01 to 0.6 mass % of P, 0.01 to 0.30 mass % of S and the remainder being Fe and inevitable impurities, wherein the ratio (Mn/S) of the Mn content to the S content is within a range of 3 to 300.

Flake graphite cast iron and production method thereof

A cylinder liner for use in an internal combustion engine has an inner peripheral surface at which a surface treatment layer is formed upon water vapor treatment. The surface treatment layer has a surface configuration capable of providing excellent lubrication oil retaining function and initial break-in property as well as capable of being machined easily. The treatment surface of the cylinder liner has a plateau configuration providing a surface roughness Rz of 0.8 to 5.9 &#x3bc;m, and the plateau configuration is defined under DIN4776 by a reduced peak height Rpk of not more than 0.64 &#x3bc;m, a core roughness depth Rk of 0.05 to 1.8 &#x3bc;m, and a reduced valley depth Rvk of 0.15 to 3.3 &#x3bc;m. For grinding to the surface, a honing machine employs a grindstone containing metal bonded diamond grains at high density. Diamond grain size is not less than 4000.

Growing community of inventors

Saitama, Japan

Yoshiki Ishikawa