کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10629439 | 991063 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of Mg-doping, calcium pyrophosphate impurities and cooling rate on the allotropic α â β-tricalcium phosphate phase transformations
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Influence of Mg-doping, calcium pyrophosphate impurities and cooling rate on the allotropic α â β-tricalcium phosphate phase transformations Influence of Mg-doping, calcium pyrophosphate impurities and cooling rate on the allotropic α â β-tricalcium phosphate phase transformations](/preview/png/10629439.png)
چکیده انگلیسی
Alpha and beta-tricalcium phosphates are allotropic phases which play a very important role as bone graft substitutes, namely in calcium phosphate cements. Despite extensive research efforts, contradictory reports exist on the importance of quenching for maintaining α-TCP purity. The role of calcium pyrophosphate impurities derived from a certain calcium-deficiency, hydroxyapatite impurities derived from calcium excess, and various ionic substitutions on thermal stability of these phases was not yet fully disclosed. The present work reports on the kinetics of α â β-TCP phase transformations of calcium-deficient TCP powders with different Mg-doping extents (0-5 mol%) prepared by precipitation. Mg clearly enhanced the thermal stability of β-TCP. The effect of cooling rate was more complex and interdependent on the Mg content and the heat treatment schedule. High α-TCP contents were retained upon cooling at 5 °C minâ1 for Mg â¤Â 1 mol% or upon quenching from 1550 °C for Mg contents â¤2 mol%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 36, Issue 3, February 2016, Pages 817-827
Journal: Journal of the European Ceramic Society - Volume 36, Issue 3, February 2016, Pages 817-827
نویسندگان
P.M.C. Torres, J.C.C. Abrantes, A. Kaushal, S. Pina, N. Döbelin, M. Bohner, J.M.F. Ferreira,