کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10626453 | 989683 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and characterization of silica-doped aluminum nitride-aluminum nitride polytypoid composites
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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: Preparation and characterization of silica-doped aluminum nitride-aluminum nitride polytypoid composites Preparation and characterization of silica-doped aluminum nitride-aluminum nitride polytypoid composites](/preview/png/10626453.png)
چکیده انگلیسی
Fine-grained AlN-AlN polytypoid composites doped with SiO2 were prepared in situ by pressureless sintering of AlN-Al2O3 mixtures (3.7 and 10.5 mol% Al2O3) at 1870 °C using Y2O3 as sintering aid. SiO2-doping (1 wt.%) was used to stabilize the AlN polytypoids and reduce the average grain size of the polytypoids. The composites consisted of elongated SiO2 containing AlN polytypoids grains (30 and 61 vol.%) embedded in equi-axed AlN matrix. Vickers hardness and bending strength increased with polytypoid composite formation. The Young's modulus showed a maximum at 3.7 mol% Al2O3 (30 vol.% polytypoids). The fracture toughness increased up to 4.0 ± 0.3 MPa m1/2 for the composites. The toughening was caused by crack deflection due to residual strain both in the polytypoids and the AlN matrix.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 31, Issue 4, 2005, Pages 591-598
Journal: Ceramics International - Volume 31, Issue 4, 2005, Pages 591-598
نویسندگان
Inger-Lise Tangen, Yingda Yu, Tor Grande, Ragnvald Høier, Mari-Ann Einarsrud,