登入選單

返回Google圖書搜尋

Friction and Wear of Cobalt-molybdenum and Cobalt-molybdenum-chromium Alloys for Prosthetics

Robert L. Johnson

出版	National Aeronautics and Space Administration, 1971
URL	http://books.google.com.hk/books?id=gRUNUqIpHO8C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

Studies were conducted in heptane with cobalt alloys on a disk-and-conforming-shoe apparatus simulating the single motion of a human hip joint. The results showed that cobalt-molybdenumchromium alloys were brittle; that the surface finished by grinding fragmented locally; and that, subsequently, abrasion of sliding surfaces occurred. When the ground surfaces were altered by glass-bead blasting, fragmentation during the wear process was minimized. Particles loosened by the grinding.process were removed, and the bead-blasted surface provided pockets to entrap debris. Friction and wear for the bead-blasted cobalt-molybdenum-chromium alloy were significantly lower than for vitallium.