Nd[sub 2]O[sub 3]-doped Sialons with ZrO[sub 2]/ZrN additions formed by sintering and hot isostatic pressing

Journal Article · Thu Dec 01 00:00:00 EST 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb04553.x· OSTI ID:6872471

Ekstroem, T ^[1]; Herbertsson, H; James, M; Fleck, I ^[2]

---

1. Stockholm Univ. (Sweden). Dept. of Inorganic Chemistry
2. Univ. of New South Wales, Kensington (Australia). School of Materials Science and Engineering

[beta]-Sialon and Nd[sub 2]O[sub 3]-doped [alpha]-sialon materials of varying composition were prepared by sintering at 1,775 and 1,825 C and by glass-encapsulated hot isostatic pressing at 1,700 C. Composites were also prepared by adding 2--20 wt% ZrO[sub 2] (3 mol% Nd[sub 2]O[sub 3]) or 2--20 wt% ZrN to the [beta]-sialon and [alpha]-sialon matrix, respectively. Neodymium was found to be a fairly poor [alpha]-sialon stabilizer even within the [alpha]-phase solid solution area, and addition of ZrN further inhibited the formation of the [alpha]-sialon phase. A decrease in Vickers hardness and an increase in toughness with increasing content of ZrO[sub 2](Nd[sub 2]O[sub 3]) or ZrN were seen in both the HIPed [beta]-sialon/ZrO[sub 2](Nd[sub 2]O[sub 3]) composites and the HIPed Nd[sub 2]O[sub 3]-stabilized [alpha]-sialons with ZrN additions.

• OSTI ID: 6872471
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 77:12; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM NITRIDES
FRACTURE PROPERTIES
HARDNESS
HOT PRESSING
SINTERING
ALUMINIUM OXIDES
NEODYMIUM OXIDES
SILICON NITRIDES
ZIRCONIUM NITRIDES
ZIRCONIUM OXIDES
DOPED MATERIALS
FABRICATION
SAMPLE PREPARATION
ALUMINIUM COMPOUNDS
CHALCOGENIDES
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
NEODYMIUM COMPOUNDS
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
PRESSING
RARE EARTH COMPOUNDS
SILICON COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties