Abstract: A material, and a process for producing same, for fabricating components of valve-actuating mechanisms of internal combustion engines, the material comprising an iron-base sintered alloy, which comprises, by weight: 2-7% Cr (chromium); 0.1-1.5% Mo (molybdenum); 0.5-7% W (tungsten); 0.1-3% V (vanadium); and 0.5-3% C (carbon). Upon being subjected to a slide-contact with another member, the material exhibits a high degree of abrasion resistance and at the same time is capable of effectively protecting the material of a member operatively cooperating therewith in slide-contact. The material is thus highly suitable for very frequent slide-contact with a cam member or the like.

Abstract: A method of producing a graphite-based conductive coating composition to be applied to the interior wall of a color picture (cathode-ray) tube, which method comprises the steps of preparing a mixed solution of electroconductive materials by mixing graphite particles, a metal oxide and a surface treating agent with water, producing an electroconductive powder by instantaneously drying said mixed solution, and mixing said electroconductive powder with a silicate and a dispersant in water and stirring the mixture. Said metal oxide, which is a component of said mixed solution, is preferably titanium oxide and the like and said surface treating agent is preferably silicon oxide. It is also desirable that said mixed solution of electroconductive materials be dried instantaneously by spray drying.

Abstract: An iron-based sintered sliding product having improved contact fitness and resistance to wear, in which 0.1 to 3 wt. % free graphite and Fe--P--C ternary alloy phase of hardness MHv 300 to 850 having over 3% to 20% of area are dispersed into an iron-based matrix containing either one selected from 0.1 to 1 wt. % Sn and 0.1 to 1 wt. % Zn, and 1 to 10 wt. % Cu and 0.3 to 1 wt. % C. As a modified embodiment of the present invention, an alloy containing Fe--Mo as a main component may be dispersed into the iron-based matrix in place of the aforesaid Fe--P--C ternary alloy phase. Said Fe--P--C ternary alloy phase may be prepared by mixing a single metal element, Fe, C and P into the powdered raw material of the iron-based matrix. Alternatively, said Fe--P--C ternary alloy phase may be prepared by mixing Fe--P--C alloy powder into the powdered raw material of the iron-based matrix.