Ngk Insulators, Inc.

Yokohama National University

Tohoku University

National University Corporation Yokohama National University

Takanari Nakajima

Naokuni Muramatsu

Mahoto Takeda

Takashi Goto

Koudai Sasaki

Daisuke Kaneko

Hirokazu Katsui

A conductive supporting member includes an outer portion that includes a Cu matrix phase and a second phase dispersed in the Cu matrix phase and containing a Cu&#x2014;Zr compound and that has an alloy composition represented by Cu-xZr (x is atomic % of Zr and 0.5&#x2264;x&#x2264;16.7 is satisfied) and an inner portion that is present on an inner side of the outer portion, is formed of a metal containing Cu, and has higher conductivity than the outer portion.

Conductive supporting member and method for producing the same

An electrically conductive tip member includes: an inner periphery portion including a Cu matrix phase and a second phase that is dispersed in the Cu matrix phase and contains a Cu&#x2014;Zr-based compound, the inner periphery portion having an alloy composition of Cu-xZr (where x is the atomic percentage of Zr and satisfies 0.5&#x2264;x&#x2264;16.7); and an outer periphery portion that is present on an outer circumferential side of the inner periphery portion, made of a metal containing Cu, and has higher electrical conductivity than the inner periphery portion.

Electrically conductive tip member and method for producing the same

A copper alloy disclosed in the present description has a basic alloy composition represented by CuSnAl(where 8&#x2264;x&#x2264;12 and 8&#x2264;y&#x2264;9 are satisfied), in which a main phase is a &#x3b2;CuSn phase with Al dissolved therein, and the &#x3b2;CuSn phase undergoes martensitic transformation when heat-treated or worked. A method for producing a copper alloy disclosed in the present description is a casting step of melting and casting a raw material containing Cu, Sn, and Al and having a basic alloy composition represented by CuSnAl(where 8&#x2264;x&#x2264;12 and 8&#x2264;y&#x2264;9 are satisfied) so as to obtain a cast material, and a homogenization step of homogenizing the cast material in a temperature range of a &#x3b2;CuSn phase so as to obtain a homogenized material, the method includes at least the casting step.

Copper alloy and method for producing same

A copper alloy disclosed in the present description has a basic alloy composition represented by CuSnMn(where 8&#x2264;x&#x2264;16 and 2&#x2264;y&#x2264;10 are satisfied), in which a main phase is a &#x3b2;CuSn phase with Mn dissolved therein, and the &#x3b2;CuSn phase undergoes martensitic transformation when heat-treated or worked.

Growing community of inventors

Nagoya, Japan

Takanari Nakajima