2007 Fiscal Year Final Research Report Summary
APPLICATION FOR BIOMATERIALS OF CARBONATE APATITE BY SUPERPLASTIC DERFORMATION
| Project/Area Number |
17592053
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
補綴理工系歯学
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| Research Institution | Asahi University |
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Principal Investigator |
ADACHI Masanori Asahi University, SHCOOL OF DENTISTRY, ASSOCIATE PROFESSOR (60076057)
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| Co-Investigator(Kenkyū-buntansha) |
DOI YUTAKA ASAHI UNIVERSITY, SCHOOL OF DENTISTRY, PROFESSOR (40116067)
WAKAMASTU Nobukazu ASAHI UNIVERSITY, SCHOOL OF DENTISTRY, ASSITANT (00158594)
KAMEMIZU Hideo ASAHI UNIVERSITY, SCHOOL OF DENTISTRY, LECTURER (00152877)
IIJIMA MAYUMI ASAHI UNIVERISTY, SCHOOL OF DENTISTRY, ASSISTANT (80164838)
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| Project Period (FY) |
2005 – 2007
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| Keywords | APATITE / SUPER PLASTIC DEFORMATION / LIQUID PHASE / X-RAY DIFRACTION / BIOCOMPATIBILITY / SINTERING / STRAIN SPEED |
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| Research Abstract |
To produce the desired shape of carbonate apatite (CAP) ceramics using superplastic deformation, deformation behavior of CAP ceramics under constant loading as well as physical properties after deformation were evaluated. Sintered CAP ceramics were plastically deformed in an electric furnace attached to a universal hydraulic testing machine under a constant load. CAP ceramics subjected to an initial compressive pressure of 10 Mpa showed appreciable amounts of plastic deformation at temperatures ranging from 720 to 800℃. Plastic deformation increased with increasing temperature from about 10% to 70% after 2 hrs loading. A marked plastic deformation of about 70% at 800℃ would be sufficient for near-net-shape production of bioresorbable CAP bone substitutes with complex shapes. X-ray diffraction analysis and SEM observations revealed that some CAP crystals were elongated and aligned with the c-axis normal to the loading direction during the superplastic deformation.
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