Sliding contact material comprising Ag-Ni based alloy having Ni metal particles dispersed and clad composite material, and Dc compact motor using the same

A sliding contact material comprising an Ag—Ni-based alloy in which Ni metal particles are dispersed throughout the alloy, wherein the material is produced by the method comprising the steps of:

• (a) providing Ni powder that corresponds to 0.7 to 3.0 wt. % of the final material, Li that corresponds to 0.01 to 0.50 wt. % of the final material, wherein said Li is in the form of Li2CO3 powder, La that corresponds to 0.01 to 0.50 wt. % of the final material, wherein said La is in the form of La2O3 powder, and Ag powder, said Ag powder being substantially the remainder of the sliding contact material;
• (b) mixing and stirring the Ni powder, Li2CO3 powder, La2O3 powder, and Ag powder to form a uniformly dispersed mixture;
• and thereafter
• (c) forming and sintering the mixture to obtain an Ag—Ni based alloy in which the Ni metal particles are dispersed throughout the alloy.

A sliding contact material comprising an Ag alloy in which Ni metal particles and Li2CO3 powder particles are dispersed throughout the alloy, wherein the material is produced by the method comprising the steps of:

• (a) providing Ni powder that corresponds to 0.7 to 3.0 wt. %, Li2CO3 powder that corresponds to 0.053 to 2.662 wt. %, and Ag powder, said Ag powder being substantially the remainder of the sliding contact material;
• (b) mixing and stirring the Ni powder, Li2CO3 powder, and Ag powder to form a uniformly dispersed mixture;
• and thereafter
• (c) forming and sintering the mixture to obtain an Ag alloy in which Ni metal particles and Li2CO3 powder particles are dispersed throughout the alloy.

A sliding contact material comprising an Ag alloy in which Ni metal particles, Li2CO3 powder particles and La2O3 powder particles are dispersed throughout the alloy, wherein the material is produced by the method comprising the steps of:

• (a) providing Ni powder that corresponds to 0.7 to 3.0 wt. % of the final material, Li2CO3 powder that corresponds to 0.053 to 2.662 wt. %, La2O3 powder that corresponds to 0.012 to 1.173 wt. % and Ag powder, said Ag powder being substantially the remainder of the sliding contact material;
• (b) mixing and stirring the Ni powder, Li2CO3 powder, La2O3 powder, and Ag powder to form a uniformly dispersed mixture;
• and thereafter
• (c) forming and sintering the mixture to obtain Ag alloy in which Ni metal particles, Li2CO3 powder particles and La2O3 powder particles are dispersed throughout the alloy.