Applied Mathematicsematics

Download e-book for kindle: Cobalt-Base Alloys for Biomedical Applications (ASTM Special by John A. Disegi, Richard L. Kennedy, Robert Pilliar

By John A. Disegi, Richard L. Kennedy, Robert Pilliar

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Finding a suitable metal substrate/compliant layer combination could extend the acceptable life of an artificial hip joint to 25 years or more, permitting these devices to be used in younger, more active patients. Prior to this work, polymeric compliant layers had been incorporated into a fully dense cup substrate using four fixing locations but this cup only lasted a few weeks testing on a hip-joint simulator. Powder metallurgy techniques offer the possibility of creating a near-net part that has hundreds of surface pores providing suitable location sites in to which the polymeric compliant layer could be bonded.

This report on work-in-progress is intended to provide results of some tests on the corrosion resistance of amorphous A-Co-20P (atomic fractions are used throughout the paper when specifying particular compositions within an alloy system), and hardness, wear resistance, and adherence of some electrodeposited amorphous Co-Cr-C alloys, Co= (0 to 42) %, Cr - ( 88 to 14) %, C = (12 to 8) %, respectively {mass fractions, Co~ (0 to 50 ) %, Cr = (97 to 50) %, C= (2 to 3) %}. The Co-Cr-C was electrodeposited onto Co-Cr-Mo alloy meeting the compositional requirements of ASTM Standard F 75 for Co, Cr, & Mo.

Unpublished research, NIST, 1993. TESK ET AL. ON ORTHOPAEDIC APPLICATIONS [121 Commercial material identified only for specifying experimental procedure, not endorsed by NIST nor claimed to be the best for the intended purpose. 19 No 8, pp. 383-387. 43 Mechanical Properties Barbara S. Becket, t and John D. , "Effect of Powder Morphology and Sintering Atmosphere on the Structure-Property Relationships in PM Processed Co-Cr-Mo Alloys Intended for Surgical Implants," Cobalt-Base Alloys for Biomedical Applications, ASTM STP 1365, J.

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