کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1473761 991058 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
FAST/SPS sintering of nanocrystalline zinc oxide—Part II: Abnormal grain growth, texture and grain anisotropy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
FAST/SPS sintering of nanocrystalline zinc oxide—Part II: Abnormal grain growth, texture and grain anisotropy
چکیده انگلیسی

This second part describes the retention of nanocrystallinity during sintering of ZnO by means of Field-assisted Sintering Technique/Spark-Plasma-Sintering (FAST/SPS), whereas the first part [doi: 10.1016/j.jeurceramsoc.2015.12.009] concentrated on hydroxide-ion-enhanced densification and defect stoichiometry. Interface design by surface bound water on zinc oxide offers a novel method to control in a new way diffusion in nanocrystalline polycrystals. Therefore, zinc oxide powder was humidified or dried and afterwards heated quickly (100 K/min) by FAST/SPS. Interestingly, the densification is strongly promoted in presence of water reducing the sintering temperature to 400 °C. Thus, grain growth is decreased by one order of magnitude while achieving full densification. The crystalline texture developed irrespective of temperature or presence of water. Moreover, the formation of hydroxide complexion at grain boundaries is discussed as it might modify grain boundary mobility and lead to pronounced grain anisotropy perpendicular to the uniaxial applied load.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 36, Issue 5, April 2016, Pages 1221–1232
نویسندگان
, , , , , ,