کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1463666 | 989650 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Densification and grain growth during solid state sintering of LaPO4
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
This work is devoted to the kinetic study of densification and grain growth of LaPO4 ceramics. By sintering at a temperature close to 1500 °C, densification rate can reach up to 98% of the theoretical density and grain growth can be controlled in the range 0.6–4 μm. Isothermal shrinkage measurements carried out by dilatometry revealed that densification occurs by lattice diffusion from the grain boundary to the neck. The activation energy for densification (ED) is evaluated as 480 ± 4 kJ mol−1. Grain growth is governed by lattice diffusion controlled pore drag and the activation energy (EG) is found to be 603 ± 2 kJ mol−1. The pore mobility is so low that grain growth only occurs for almost fully dense materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 35, Issue 3, April 2009, Pages 1115–1120
Journal: Ceramics International - Volume 35, Issue 3, April 2009, Pages 1115–1120
نویسندگان
Damien Bregiroux, Fabienne Audubert, Didier Bernache-Assollant,