کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1462190 989628 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Research of phase transformation induced biodegradable properties on hydroxyapatite and tricalcium phosphate based bioceramic
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Research of phase transformation induced biodegradable properties on hydroxyapatite and tricalcium phosphate based bioceramic
چکیده انگلیسی

Biodegradable calcium phosphate composites consisting of tricalcium phosphate (α-TCP) and hydroxyapatite (HA) were prepared using a two-step sintering method. The ratio of α-TCP/HA was controlled by modulating the sintering temperature. The initial calcination process at 800 °C causes HA dehydroxylation and induces the early transformation of HA into α-TCP in subsequent sintering processes. At the optimum sintering temperature of 1300 °C, the material is comprised of a moderate ratio of α-TCP to HA (3:7) and possesses a hardness of 5.0 GPa. The high temperature phase transformation from HA to α-TCP accompanied by bonded water loss, which results in the formation of nano-pores within the α-TCP matrix, hardly deteriorated the mechanical strength of the composite. This pore-containing structure also provided a convincing evidence for the origin of the high degradability of α-TCP in a biological environment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 39, Issue 2, March 2013, Pages 1455–1462
نویسندگان
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