کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1605336 1516213 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pressureless sintered magnesium aluminate spinel with enhanced mechanical properties obtained by the two-step sintering method
ترجمه فارسی عنوان
اسپینل آلومینات منیزیم متخلخل تحت فشار با خواص مکانیکی افزایش یافته توسط روش دو مرحله ای پخت
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی


• The effects of sintering parameters on the microstructure of magnesium aluminate spinel are investigated.
• By using single-step sintering method, the densification kinetics of MAS is different from grain growth kinetics.
• A MAS material with a high relative density and a homogeneous microstructure consisting of small grains is achieved under optimum two-step sintering.
• The flexure strength and Vickers hardness of the MAS sintered at optimum two-step sintering are improved.

The effects of sintering parameters, first and second step sintering temperatures (T1 and T2, respectively), on the microstructure of magnesium aluminate spinel (MAS) were investigated. A single-step sintering (SSS) method was used to determine the appropriate temperatures for the first step. Different two-step sintering (TSS) regimes were used to investigate the effect of second step sintering temperatures on densification behavior and grain growth. The results show that, by using SSS method, the densification kinetics of MAS is different from grain growth kinetics. A MAS material with a high relative density of 96.17% and a homogeneous microstructure consisting of small grains (680 nm) is achieved under optimum TSS conditions (T1 = 1650 °C/0 h and T2 = 1550 °C/10 h). Compared with conventional specimen, the bending strength (240 MPa) and Vickers hardness (11.05 GPa) of the sintered samples fabricated under optimum TSS increased by 54.8% and 52.2%, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 680, 25 September 2016, Pages 133–138
نویسندگان
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