liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Mixed α- and β-(Si-Al-O-N) Materials with Yttria and Neodymia Additions
AB Sandvik Hard Materials, Stockholm, Sweden.
University of Stockholm, Sweden.
University of Stockholm, Sweden.
University of Stockholm, Sweden.
1988 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 105/106, 161-168 p.Article in journal (Refereed) Published
Abstract [en]

A number of ceramic materials have been fabricated on a semipilot plant scale at different overall compositions in the (Y, Nd)---Al---O---N system at 177°C. Constant molar amounts of oxide mixtures of Y2O3: Nd2O3 in the ratios 100:0, 75:25, 50:50, 25:75 or 0:100 have been added. Dense materials were obtained for all compositions except those corresponding to mixed α- and β-(Si---Al---O---N) with higher α-(Si---Al---O---N) contents and high Nd2O3 contents. At the preparation temperature used in this study, the formation of an α-(Nd---Si---Al---O---N) seems prohibited and, thus, with increasing Nd2O3 content the amount of α-(Si---Al---O---N) decreased. The Nd2O3 added mainly formed crystalline intergranular phases such as the N-melilite phase, which increased in amount with increasing Nd2O3 in the starting mix. Hardness and indentation fracture toughness measurements were made and are discussed in relation to the phase composition and the microstructure. Some of the high Nd2O3 content Si---Al---O---N materials have as high fracture toughness values as the pure Y2O3 Si---Al---O---N materials do.

Place, publisher, year, edition, pages
Elsevier, 1988. Vol. 105/106, 161-168 p.
National Category
Natural Sciences
URN: urn:nbn:se:liu:diva-60863DOI: 10.1016/0025-5416(88)90492-2OAI: diva2:359596
Available from: 2010-10-28 Created: 2010-10-28 Last updated: 2016-06-30

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Käll, Per-Olov
In the same journal
Materials Science & Engineering: A
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 37 hits
ReferencesLink to record
Permanent link

Direct link