Combined Synthesis of Heterogeneous Powders in CaB6–TiB2 System

Autor:	S. S. Ordan’yan, A. S. Lysenkov, D. P. Danilovich, D. D. Nesmelov, T. V. Kotsar
Rok vydání:	2019
Předmět:	Pressing Materials science Boron carbide Hot pressing Isothermal process chemistry.chemical_compound Volume (thermodynamics) chemistry Chemical engineering Impurity Materials Chemistry Ceramics and Composites Particle Crystallite
Zdroj:	Refractories and Industrial Ceramics. 59:528-533
ISSN:	1573-9139 1083-4877
DOI:	10.1007/s11148-019-00266-5
Popis:	The heterogeneous CaB6–TiB2 powder mixtures were synthesized by reducing the mixture of TiO2 and CaCO3 with boron carbide in vacuum at 1400 – 1650°C. Reaction hot pressing was conducted according to the following regime: 1500°C (synthesis in vacuum) – 1900°C (pressing in Ar). As a result of synthesizing CaB6–TiB2 at mass ratio of 1:1 and 1600°C followed by isothermal soaking for 1 hour, a heterogeneous mixture was obtained containing crystalline phases of CaB6 and TiB2 with the residual B4C impurity (0.5 wt. %). The powder particles represent grains measuring 1 – 3 μm in diameter and containing two phases CaB6 and TiB2 in the form of crystallites measuring 0.1 – 1.0 μm in diameter uniformly distributed throughout the particle volume.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3d5050b78885d4671ae0d220392a83c0 https://doi.org/10.1007/s11148-019-00266-5 Zobrazit plný text záznamu Full text from SpringerLink