کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7886590 | 1509787 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Interface design in 3D-SiC/Al-Si-Mg interpenetrating composite fabricated by pressureless infiltration
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
3D-SiC/Al-Si-Mg interpenetrating composites (IPCs) were fabricated by pressureless infiltration method. Interfaces in the 3D-SiC/Al-Si-Mg IPCs were modificated by using two different kinds of aluminum alloy Al-15Si-10Mg and Al-9Si-6Mg to infiltrate into 3D-SiC performs and different treated 3D-SiC preforms unoxidized or preoxidized in air at 1000â¯Â°C, 1100â¯Â°C and 1200â¯Â°C for 2â¯h respectively. Results showed that desired interfaces can be achieved in both IPCs made with those two aluminum alloys, as demonstrated by their excellent comprehensive properties. When the Al-15Si-10Mg alloy with excessive Si content is used for infiltration, interfaces in 3D-SiC/Al-Si-Mg IPC fabricated with the unoxidized 3D-SiC preform are directly bonded through atomic matching without any interfacial reaction and the composite has the properties of a thermal conductivity (TC) of 224.5â¯W/(mâ¯Â°C), a thermal expansion coefficient (CTE) (RT ~ 300â¯Â°C) of 7.04â¯Ãâ¯10â6/°C and a bending strength (BS) of 277â¯MPa. When the Al-9Si-6Mg alloy with a lower Si content is used for infiltration, interface zone with a thickness around 200â¯nm forms in the 3D-SiC/Al-Si-Mg IPC fabricated with the 3D-SiC preform preoxidized at 1000â¯Â°C. The reaction-bonded interface is composed of AlN and MgAl2O4 which have better interface affinity with SiC and can isolate SiC effectively from liquid Al against the formation of detrimental Al4C3 phase. The composite has the properties of a TC of 219.5â¯W/(m °C), a CTE (RT ~ 300â¯Â°C) of 7.66â¯Ãâ¯10â6/°C and a BS of 318â¯MPa.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 11, 1 August 2018, Pages 11956-11965
Journal: Ceramics International - Volume 44, Issue 11, 1 August 2018, Pages 11956-11965
نویسندگان
Dongmei Wang, Zhixiang Zheng, Jun Lv, Guangqing Xu, Shiang Zhou, Wenming Tang, Yucheng Wu,