Pulsed electric current sintering of TiB۲-based ceramics using nitride additives

  • سال انتشار: 1399
  • محل انتشار: فصلنامه سنتز و تفجوشی، دوره: 1، شماره: 1
  • کد COI اختصاصی: JR_SYNSINT-1-1_002
  • زبان مقاله: فارسی
  • تعداد مشاهده: 213
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نویسندگان

Naeimeh Sadat Peighambardoust

Koç University Boron and Advanced Materials Applications and Research Center (KUBAM), Sariyer, Istanbul, ۳۴۴۵۰, Turkey

Çağın Çevik

Department of Biophysics, Istanbul University-Cerrahpasa, Istanbul, Turkey

Tannaz Assar

Department of Geophysical Engineering, Istanbul Technical University, Istanbul, Turkey

Sunghoon Jung

Advanced Nano Surface Department, Korea Institute of Materials Science, Changwon, ۵۱۵۰۸, Republic of Korea

Seon Yong Lee

Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul ۰۸۸۲۶, Republic of Korea

Joo Hwan Cha

Innovative Enterprise Cooperation Center, Korea Institute of Science & Technology, Hwarangro ۱۴-gil, Seongbuk-gu, Seoul ۰۲۷۹۲, Republic of Korea

چکیده

In this research, various types of nitride additives were incorporated into titanium diboride attaining dense TiB۲-based ceramics by field-assisted sintering technique. The addition of different types of nitride additives, namely Si۳N۴, BN, AlN, and TiN, significantly improved the sinterability of TiB۲, achieving near fully dense ceramics. The X-ray diffraction analysis and microstructural evaluation confirmed the presence of the h-BN compound in all specimens. In the TiB۲-Si۳N۴ ceramic, Si۳N۴ additive reacted with B۲O۳ oxide, in-situ generating h-BN, and SiO۲ phases. Although the h-BN phase was produced in the TiB۲-AlN specimen, the main proportion of AlN remained in the sample as an unreacted ex-situ phase. In terms of the TiB۲-TiN ceramic, some of the nitrogen and boron atoms could leave the TiN and TiB۲ crystalline structures, contributing to the in-situ formation of h-BN.

کلیدواژه ها

Titanium diboride, Silicon nitride, Hexagonal boron nitride, Aluminum nitride, Titanium nitride, Field assisted sintering technique

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