Abstract
Introduction The contacting surfaces subjected to progressive loss of material known as ‘wear,’ which is unavoidable between contacting surfaces. Similar kind of phenomenon observed in the human body in various joints where sliding/rolling contact takes place in contacting parts, leading to loss of material. This is a serious issue related to replaced joint or artificial joint.Case descriptionOut of the various material combinations proposed for artificial joint or joint replacement Si3N4 against Al2O3 is one of in ceramic on ceramic category. Minimizing the wear loss of Si3N4 is a prime requirement to avoid aseptic loosening of artificial joint and extending life of joint.Discussion and evaluationIn this paper, an attempt has been made to investigate the wear loss behavior of Si3N4–hBN composite and evaluate the effect of hBN addition in Si3N4 to minimize the wear loss. DoE–Taguchi technique is used to plan and analyze experiments.ConclusionAnalysis of experimental results proposes 15 N load and 8 % of hBN addition in Si3N4 is optimum to minimize wear loss against alumina.
Highlights
The contacting surfaces subjected to progressive loss of material known as ‘wear,’ which is unavoidable between contacting surfaces
When we are proposing Si3N4–Hexagonal boron nitride (hBN) composite as an alternative for hip/knee joint replacement (Neumann et al 2004; Boshitskaya et al 1996; Gangopadhyay et al 1997; Saito et al 1999), it is clear that an amount weight of a person changes from person to person
We tried to evaluate the combined effect of load and % of hBNon wear loss of silicon nitride
Summary
The contacting surfaces subjected to progressive loss of material known as ‘wear,’ which is unavoidable between contacting surfaces. Similar kind of phenomenon observed in the human body in various joints where sliding/rolling contact takes place in contacting parts, leading to loss of material This is a serious issue related to replaced joint or artificial joint. Since from last four decades, bio-inert alumina ceramic (aluminum oxide) have presented an attractive alternative for THR bearing surface in terms of improved wear resistance and extended joint life. Carrapichano et al (2002) conducted sliding wear test on PoD tribometer for Si3N4–BN composite in a self-mated pair, with 10, 18 and 25 vol% of BN in Si3N4 They concluded that addition of Boron up to 10 % improved tribological properties of Si3N4 and further addition affect to mechanical properties of Si3N4. They reported that friction coefficient reduces up to 0.19 for 20 % hBN in Si3N4
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