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Titolo:
MICROSTRUCTURE AND HIGH-TEMPERATURE TENSI LE PROPERTIES OF TIC TI5SI3/TI3SIC2 FINE COMPOSITES PREPARED BY MECHANICAL ALLOYING/
Autore:
KAWAMORI S; SASAKI N; ISHIKAWA F; NAGUMO M; OKUMURA T; AMEYAMA K;
Indirizzi:
JAPAN ULTRA HIGH TEMP MAT RES INST UBE YAMAGUCHI 755 JAPAN WASEDA UNIV,DEPT MAT SCI & ENGN TOKYO 169 JAPAN RITSUMEIKAN UNIV,FAC SCI & ENGN,DEPT MECH ENGN KUSATSU 52577 JAPAN
Titolo Testata:
Nippon Kinzoku Gakkaishi
fascicolo: 1, volume: 62, anno: 1998,
pagine: 30 - 36
SICI:
0021-4876(1998)62:1<30:MAHTLP>2.0.ZU;2-D
Fonte:
ISI
Lingua:
JPN
Soggetto:
TI3SIC2;
Keywords:
MECHANICAL ALLOYING; CERAMICS COMPOSITE; SUPERPLASTICITY; TIC; TI5SI3; TI3SIC2;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
S. Kawamori et al., "MICROSTRUCTURE AND HIGH-TEMPERATURE TENSI LE PROPERTIES OF TIC TI5SI3/TI3SIC2 FINE COMPOSITES PREPARED BY MECHANICAL ALLOYING/", Nippon Kinzoku Gakkaishi, 62(1), 1998, pp. 30-36

Abstract

Microstructure and tensile properties at elevated temperatures of fine composites prepared by mechanical alloying of Ti and SiC powders have been investigated. Mixtures of elemental Ti and SiC powders in the composition of Ti-24 mass%SiC are milled under an Ar atmosphere using an attritor ball mill. After milling for 36 ks, formation of TiC and Ti5Si3 is observed and further milling adding n-heptane for 3.6 ks makesthe powder particles finer. Milled powders are consolidated by hot pressing at 1773 K for 10.8 ks under 70 MPa and hot isostatic pressing at 1773 K for 10.8 ks under 196 MPa. The compact consists of mostly equi-axed TIC and Ti5Si3 grains of an average diameter of 0.86 mu m partially mixed with plate-like phase of T3SiC2. The compact shows elongation of 130% at tensile test at 1773 K with an initial strain rate of 4.0 x 10(-4) s(-1) with the strain rate sensitivity exponent of 0.38. Most grains remain equi-axed after tensile test, while random orientations of plate-like phases of Ti3SiC2 turn parallel along the tensile axis. The large elongation observed above 1773 K is likely due to the superplasticity, while rotation of the plate-like phase accompanies deformation of the surrounding matrix.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/07/20 alle ore 06:16:07