Patent ID: 6015627
Filing Date: 2000-01-18
Classification: G11B,Y10T

Abstract:
A magnetic head drum on which a magnetic head for magnetic recording and reproducing is supported, comprising:an inner body made of an aluminum alloy and having an outer cylindrical circumference; anda wear-resistant layer of a sintered powdery alloy disposed around said outer circumference of said inner body, said wear-resistant layer integrally formed on said inner body by sintering in place in at least a region for sliding contact between the head drum and an elongate magnetic recording medium, said wear-resistant layer having a thickness of at least 0.2 mm. said sintered powdery alloy comprising a powdery alloy of 17 to 38% of Si particles, 0.5 to 5% of Cu, 0.3 to 5% of Mg by weight, and the remainder of aluminum, said sintered alloy material being completely alloy-coupled to said inner body and thereby exhibiting no defined boundary between the inner body and the wear-resistant layer, said particles of Si of said powdery alloy having an average diameter ranging from 1 to 8 .mu.m, said particles of said powdery alloy having Si particles no larger than 8 .mu.m in diameter.