Manufacture and examination of C/Si3N4 nanocomposites

Balazsi, Filiz; CINAR, FS; ADDEMIR, O; WEBER, F; ARATO, P

doi:10.1016/j.jeurceramsoc.2003.10.021

Manufacture and examination of C/Si3N4 nanocomposites

Atıf İçin Kopyala

Balazsi C., CINAR F., ADDEMIR O., WEBER F., ARATO P.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, cilt.24, sa.12, ss.3287-3294, 2004 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 24 Sayı: 12
Basım Tarihi: 2004
Doi Numarası: 10.1016/j.jeurceramsoc.2003.10.021
Dergi Adı: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.3287-3294
İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

C/Si3N4 nanocomposites have been prepared through carbon black nanograins, graphite micrograins addition to silicon nitride starting powder. The role of excess oxygen was examined by oxidising the alpha silicon nitride starting powder. For nanocomposite processing sinter-HIP and hot press have been applied. Bending strength and elastic modulus have been found to be influenced by amount of carbon black and graphite introduced in silicon nitride matrix. In the case of HIP samples a desintering process was observed. During pressure-less sintering step the structure retained the alpha-Si3N4 phase, after second sintering step new phase(s) appeared. Hot pressed samples with a higher alpha-Si3N4 phase contribution showed considerable improvement of hardness. (C) 2003 Elsevier Ltd. All rights reserved.