Abstract
Zirconia-based ceramics with high strength have been identified as a material of choice for sliding components in a variety of biomedical and engineering applications. Despite the high flexural strength, zirconia prostheses are still vulnerable to wear and surface damage. We hypothesize that such tribological damage may be substantially mitigated by an engineered grading of elastic modulus at the ceramic surface. In this study, graded structures were fabricated by infiltrating glass into the top and bottom surfaces of zirconia plates, with resulting diminished modulus in the outer surfaces. The plates were then subjected to frictional sliding tests using a hard spherical indenter. Compared with noninfiltrated controls, infiltrated specimens showed a significant increase in the fracture loads, by over a factor of 3. The increase in the sliding contact resistance is attributed to the diminishing tensile stresses at the graded lower modulus surface. The results confirm that suitably graded structures can be highly beneficial in the design of next-generation orthopedic and dental prostheses.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 347-352 |
| Number of pages | 6 |
| Journal | Journal of Biomedical Materials Research - Part B Applied Biomaterials |
| Volume | 94 |
| Issue number | 2 |
| DOIs | |
| State | Published - 2010 |
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Keywords
- Elastic modulus gradients
- Functionally graded materials
- Sliding contact
- Wear
- Zirconia (Y-TZP)
ASJC Scopus subject areas
- Biomedical Engineering
- Biomaterials
- Medicine(all)
Cite this
Improving the resistance to sliding contact damage of zirconia using elastic gradients. / Kim, Jae Won; Liu, Lela; Zhang, Yu.
In: Journal of Biomedical Materials Research - Part B Applied Biomaterials, Vol. 94, No. 2, 2010, p. 347-352.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Improving the resistance to sliding contact damage of zirconia using elastic gradients
AU - Kim, Jae Won
AU - Liu, Lela
AU - Zhang, Yu
PY - 2010
Y1 - 2010
N2 - Zirconia-based ceramics with high strength have been identified as a material of choice for sliding components in a variety of biomedical and engineering applications. Despite the high flexural strength, zirconia prostheses are still vulnerable to wear and surface damage. We hypothesize that such tribological damage may be substantially mitigated by an engineered grading of elastic modulus at the ceramic surface. In this study, graded structures were fabricated by infiltrating glass into the top and bottom surfaces of zirconia plates, with resulting diminished modulus in the outer surfaces. The plates were then subjected to frictional sliding tests using a hard spherical indenter. Compared with noninfiltrated controls, infiltrated specimens showed a significant increase in the fracture loads, by over a factor of 3. The increase in the sliding contact resistance is attributed to the diminishing tensile stresses at the graded lower modulus surface. The results confirm that suitably graded structures can be highly beneficial in the design of next-generation orthopedic and dental prostheses.
AB - Zirconia-based ceramics with high strength have been identified as a material of choice for sliding components in a variety of biomedical and engineering applications. Despite the high flexural strength, zirconia prostheses are still vulnerable to wear and surface damage. We hypothesize that such tribological damage may be substantially mitigated by an engineered grading of elastic modulus at the ceramic surface. In this study, graded structures were fabricated by infiltrating glass into the top and bottom surfaces of zirconia plates, with resulting diminished modulus in the outer surfaces. The plates were then subjected to frictional sliding tests using a hard spherical indenter. Compared with noninfiltrated controls, infiltrated specimens showed a significant increase in the fracture loads, by over a factor of 3. The increase in the sliding contact resistance is attributed to the diminishing tensile stresses at the graded lower modulus surface. The results confirm that suitably graded structures can be highly beneficial in the design of next-generation orthopedic and dental prostheses.
KW - Elastic modulus gradients
KW - Functionally graded materials
KW - Sliding contact
KW - Wear
KW - Zirconia (Y-TZP)
UR - http://www.scopus.com/inward/record.url?scp=77955352836&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955352836&partnerID=8YFLogxK
U2 - 10.1002/jbm.b.31657
DO - 10.1002/jbm.b.31657
M3 - Article
VL - 94
SP - 347
EP - 352
JO - Journal of Biomedical Materials Research - Part B Applied Biomaterials
JF - Journal of Biomedical Materials Research - Part B Applied Biomaterials
SN - 1552-4973
IS - 2
ER -