کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5457843 | 1515953 | 2017 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A study on the sintering of ultrafine grained tungsten with Ti-based additives
ترجمه فارسی عنوان
یک مطالعه در مورد پخت و پز تنگستن فوق العاده دانه با افزودنی های تیتانیوم
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کلمات کلیدی
مواد نانوکریستال، تنگستن، تیتانیوم، پختن رشد دانه، دانه فوق العاده ای
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
چکیده انگلیسی
Tungsten (W) is a brittle material at room temperature making it very difficult to fabricate. Although the lack of ductility remains a difficult challenge, nano-sized and ultrafine grain (UFG) microstructures offer potential for overcoming tungsten's room temperature brittleness. One way to manufacture UFG W is to compact and sinter nanosized W powder, however, it is a non-trivial task to control grain growth during sintering. In an effort to inhibit grain growth, the effect of Ti-based additives on the densification and grain growth of nano-W powders was investigated in this study. The addition of 1Â wt.% Ti into tungsten led to more than a 63% decrease in average grain size of sintered samples at comparable density levels. It was also found that sintering in Ar yielded a finer grain size than sintering in H2 at similar densities. Compared to conventional high temperature sintering, a lower temperature sintering cycle for a longer hold time resulted in both near-full density and fine grain size. The roles of the Ti additive include not only the inhibition of grain growth, but also the potential absorption of oxygen from W particles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 65, June 2017, Pages 2-8
Journal: International Journal of Refractory Metals and Hard Materials - Volume 65, June 2017, Pages 2-8
نویسندگان
Chai Ren, Mark Koopman, Z. Zak Fang, Huan Zhang, Brian van Devener,