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Key issues on the reactive sintering of ZrB2 ceramics from elementary raw materials.
- Source :
-
Scripta Materialia . Apr2019, Vol. 164, p105-109. 5p. - Publication Year :
- 2019
-
Abstract
- Abstract Gas burst has been commonly observed during reactive sintering, especially when combustion was initialized therein. In this study, a model system (Zr + 2B = ZrB 2) was chosen to investigate this phenomenon by a combination of thermo-analysis, mass spectrum investigation and electron microscopy studies. Results showed the combustion lead to a formation of various gaseous byproducts such as CO, CO 2 , N 2 , BO, BO 2 and B 2 O 3 etc. Especially for BO(g), its generation consumed boron in the raw materials, resulting in the residual Zr-containing phase that accelerated the formation of interlocked ZrB 2 grains in the sintered ceramics, which show relatively high strength (516 ± 42 MPa). Graphical abstract Unlabelled Image [ABSTRACT FROM AUTHOR]
- Subjects :
- *ZIRCONIUM boride
*SINTERING
*CERAMIC materials
*RAW materials
*ELECTRON microscopy
Subjects
Details
- Language :
- English
- ISSN :
- 13596462
- Volume :
- 164
- Database :
- Academic Search Index
- Journal :
- Scripta Materialia
- Publication Type :
- Academic Journal
- Accession number :
- 134796102
- Full Text :
- https://doi.org/10.1016/j.scriptamat.2019.01.044