Metal-graphite brush and production method thereof
AssigneesTRIS Inc., Denso Corporation
InventorsTakayoshi Otani, Osamu Takada, Mitsuo Ikeda, Yoichi Sakaura, Naoki Morita, Takahiro Sakamoto, Kyoji Inukai, Youichi Murakami, Yasuyuki Wakahara, Masami Niimi, Ryoichi Honbo
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Abstract
Ag particles produced by chemical reduction and having a mean particle size of 5 μm are added by 0.05-3 wt % and Zn are added by 2-10 wt % to a Pb-less brush body containing graphite, Cu and a metal sulfide solid lubricant of a metal-graphite brush.
Claims12
A metal-graphite brush, comprising:
- a Cu-graphite brush body added with a metal sulfide solid lubricant;
- and an outer terminal connected to the brush body, characterized in that Ag particles having a mean particle size of not more than 5 μm are added to at least one of said brush body and a neighborhood of connecting interface between said brush body and said outer terminal.
A production method of a metal-graphite brush having a brush body and an outer terminal, comprising a step for producing the brush body by sintering a compounded powder including graphite powder, Cu powder, and a metal sulfide solid lubricant, characterized in that the compounded powder, to be used at least in a neighborhood of a connecting interface between said brush body and the outer terminal, further includes Ag particles produced by chemical reduction and having a mean particle size of not more than 5 μm by 0.05-3 wt % based on a weight after sintering.
A production method of a metal-graphite brush having a brush body comprising:
- compounding and mixing graphite powder, a metal sulfide solid lubricant powder, Cu powder, Ag particles produced by chemical reduction and having a mean particle size of 5 μm, and Zn powder to a compounded powder;
- molding the compounded powder;
- and sintering the molded powder into the brush body.
Dependencies are inferred from the claim text.