Conventional sintering route for the production of alumina-based nanocomposites: A microstructural characterization

被引:0
|
作者
Palmero, Paola
Esnouf, Claude
Montanaro, Laura
Fantozzi, Gilbert
机构
[1] Politecn Torino, Dept Mat Sci & Chem Engn, INSTM, UDR POLITO, I-10129 Turin, Italy
[2] Inst Natl Sci Appl, Etud Met Phys & Phys Mat Grp, F-69621 Villeurbanne, France
来源
关键词
Alumina-YAG; nanocomposites; free sintering; X-ray diffraction; SEM; TEM;
D O I
10.4028/www.scientific.net/KEM.317-318.267
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Two alpha-Al(2)O(3)/YAG composite powders have been prepared by reverse-strike precipitation, starting from chlorides aqueous solutions, the former containing 50 vol% of the two phases (labelled as AY50) and the latter made of 90 vol% of alumina and 10 vol% of YAG (AY90). The as-prepared powders were characterised by DTA/TG simultaneous analysis as well as by XRD analysis performed after calcination at different temperatures. A systematic TEM analysis was performed on AY50 powders pre-treated at different temperatures, in order to investigate the crystallites size evolution as a function of the temperature. After that, samples were compacted by uniaxial pressing and sintered at 1600 degrees C for 3h. SEM observations revealed a homogeneous microstructure made of micronic alpha-alumina and YAG grains. For limiting grain growth through the decreasing of the maximum sintering temperature, an innovative activation procedure by coupling suitable thermal and mechanical treatments of the powders was performed. After that, high densification (> 95% of the theoretical density) was easily achieved by performing a free sintering in the temperature range between 1320 degrees and 1420 degrees C, with different soaking times at the maximum temperature. The resulting sintered bodies showed an effective retention of the nano-size of the primary particles. By SEM, highly-homogeneous nanostructures, with an average grains size of about 200 and 300 nm for AY50 and AY90, respectively, were observed.
引用
收藏
页码:267 / 270
页数:4
相关论文
共 50 条
  • [1] Processing of alumina-based composites via conventional sintering and their characterization
    Verma, Vikas
    Kumar, B. V. Manoj
    [J]. MATERIALS AND MANUFACTURING PROCESSES, 2017, 32 (01) : 21 - 26
  • [2] Alumina-based nanocomposites consolidated by spark plasma sintering
    Zhan, GD
    Kuntz, J
    Wan, J
    Garay, J
    Mukherjee, AK
    [J]. SCRIPTA MATERIALIA, 2002, 47 (11) : 737 - 741
  • [3] Fabrication of Alumina-Based Metal Nanocomposites by Pressureless Sintering and Their Mechanical Properties
    Oh, Sung-Tag
    Lee, Sung-Il
    [J]. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2010, 10 (01) : 366 - 369
  • [4] Sliding wear behaviour of alumina/nickel nanocomposites processed by a conventional sintering route
    Rodriguez-Suarez, T.
    Bartolome, J. F.
    Smirnov, A.
    Lopez-Esteban, S.
    Torrecillas, R.
    Moya, J. S.
    [J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2011, 31 (08) : 1389 - 1395
  • [5] Fabrication of alumina-based toughened nanocomposites
    Matsunaga, T
    Leela-Adisorn, U
    Kobayashi, Y
    Choi, SM
    Awaji, H
    [J]. JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 2005, 113 (1313) : 123 - 125
  • [6] Characterization and mechanical testing of alumina-based nanocomposites reinforced with niobium and/or carbon nanotubes fabricated by spark plasma sintering
    Thomson, K. E.
    Jiang, D.
    Yao, W.
    Ritchie, R. O.
    Mukherjee, A. K.
    [J]. ACTA MATERIALIA, 2012, 60 (02) : 622 - 632
  • [7] Strengthening mechanism of alumina-based nanocomposites
    Ohji, T.
    [J]. Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, 2001, 48 (04): : 347 - 352
  • [8] Multifunctional properties of alumina-based graphene nanocomposites as catalysts for esters of glycerol production
    Bezerra, Rita de Cássia F.
    Mota, Gabriela
    Vidal, Ruth Maria B.
    Saraiva, Gilberto D
    Oliveira, Alcineia C.
    Castro, Antonio Joel R.
    Araújo, Rinaldo S.
    Rodríguez-Aguado, Elena
    Jiménez Jiménez, José
    Rodríguez-Castellón, Enrique
    [J]. Molecular Catalysis, 2023, 548
  • [9] Soaking method for fabrication of alumina-based nanocomposites
    Leela-adisorn, U
    Matsunaga, T
    Kobayashi, Y
    Choi, SM
    Awaji, H
    [J]. CERAMICS INTERNATIONAL, 2005, 31 (06) : 803 - 809
  • [10] ELECTRO DISCHARGE MACHINABLE ALUMINA-BASED NANOCOMPOSITES
    Diaz, Luis A.
    Okunkova, Anna
    Solis, Washington
    Peretyagin, Pavel
    Gotor, Francisco J.
    Torrecillas, Ramon
    [J]. 20TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS, 2015,