On the peritectoid Ti3Si formation in Ti-Si alloys
Ti-13DDT5Si and Ti-25Si (at.%) alloys have been arc-melted from high-purity raw materials, using a water-cooled copper hearth, a non-consumable tungsten electrode, and under an Ar atmosphere gettered by titanium. The cast ingots were then heat-treated for 90 h at 1000 and 1100 DDGC in an inert atmos...
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| Veröffentlicht in: | Materials characterization 2006-03, Vol.56 (2), p.107-111 |
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| creator | SARAIVA RAMOS, Alfeu NUNES, Carlos Angelo CARVALHO COELHO, Gilberto |
| description | Ti-13DDT5Si and Ti-25Si (at.%) alloys have been arc-melted from high-purity raw materials, using a water-cooled copper hearth, a non-consumable tungsten electrode, and under an Ar atmosphere gettered by titanium. The cast ingots were then heat-treated for 90 h at 1000 and 1100 DDGC in an inert atmosphere, and both the as-cast and the heat-treated alloys were characterized using scanning electron microscopy and an energy dispersive microanalysis system. The as-cast Ti-13DDT5Si alloy presented a eutectic microstructure composed of the TiSS and Ti5Si3 phases, while the microstructure of the as-cast Ti-25Si alloy showed the presence of large primary precipitates of Ti5Si3 in a eutectic matrix of TiSS and Ti5Si3. Subsequent heat treatment at 1100 DDGC produced no significant microstructural modifications in the Ti-25Si alloy, and it is suggested that the presence of the large primary precipitates of Ti5Si3 contributed to a reduction in the kinetics of Ti3Si formation. In the Ti-13DDT5Si alloys, the formation of Ti3Si was not observed after heat treatment at 1000 DDGC, but a large amount of Ti3Si was found after heat treatment at 1100 DDGC, confirming its existence in Ti-Si alloys containing low interstitial contents. |
| doi_str_mv | 10.1016/j.matchar.2005.09.009 |
| format | Article |
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The cast ingots were then heat-treated for 90 h at 1000 and 1100 DDGC in an inert atmosphere, and both the as-cast and the heat-treated alloys were characterized using scanning electron microscopy and an energy dispersive microanalysis system. The as-cast Ti-13DDT5Si alloy presented a eutectic microstructure composed of the TiSS and Ti5Si3 phases, while the microstructure of the as-cast Ti-25Si alloy showed the presence of large primary precipitates of Ti5Si3 in a eutectic matrix of TiSS and Ti5Si3. Subsequent heat treatment at 1100 DDGC produced no significant microstructural modifications in the Ti-25Si alloy, and it is suggested that the presence of the large primary precipitates of Ti5Si3 contributed to a reduction in the kinetics of Ti3Si formation. 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In the Ti-13DDT5Si alloys, the formation of Ti3Si was not observed after heat treatment at 1000 DDGC, but a large amount of Ti3Si was found after heat treatment at 1100 DDGC, confirming its existence in Ti-Si alloys containing low interstitial contents.</description><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Exact sciences and technology</subject><subject>Materials science</subject><subject>Phase diagrams and microstructures developed by solidification and solid-solid phase transformations</subject><subject>Physics</subject><subject>Solidification</subject><issn>1044-5803</issn><issn>1873-4189</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNpFkFFLwzAUhYMoOKc_QeiLvrXe9DZN8ihDpzDYg30PaZqylK6ZSfewf2_GBj7dw-Gcc-Ej5JlCQYHWb0Ox17PZ6VCUAKwAWQDIG7KggmNeUSFvk4aqypkAvCcPMQ4AUAvKF6TcTtm8s9nBBjdbM3vXZY3DH5f1PqRZ56fMTcnKk6XH0Z_iI7nr9Rjt0_UuSfP50ay-8s12_b163-QGBcw5RQbYSs3AYk1FpSVgz6sWKgEldgBGtoazui5ThCN0stNdKWpsed8i4JK8XmYPwf8ebZzV3kVjx1FP1h-jKgWnaVakILsETfAxBturQ3B7HU6KgjoDUoO6AlJnQAqkSoBS7-X6QEejxz7oybj4X-ZMoGQM_wD_TmYr</recordid><startdate>20060301</startdate><enddate>20060301</enddate><creator>SARAIVA RAMOS, Alfeu</creator><creator>NUNES, Carlos Angelo</creator><creator>CARVALHO COELHO, Gilberto</creator><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20060301</creationdate><title>On the peritectoid Ti3Si formation in Ti-Si alloys</title><author>SARAIVA RAMOS, Alfeu ; NUNES, Carlos Angelo ; CARVALHO COELHO, Gilberto</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-13503b9a50e36184a903f74b048023d00c9bc75662a50730d9dad2863b7fb303</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Exact sciences and technology</topic><topic>Materials science</topic><topic>Phase diagrams and microstructures developed by solidification and solid-solid phase transformations</topic><topic>Physics</topic><topic>Solidification</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>SARAIVA RAMOS, Alfeu</creatorcontrib><creatorcontrib>NUNES, Carlos Angelo</creatorcontrib><creatorcontrib>CARVALHO COELHO, Gilberto</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Materials characterization</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>SARAIVA RAMOS, Alfeu</au><au>NUNES, Carlos Angelo</au><au>CARVALHO COELHO, Gilberto</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>On the peritectoid Ti3Si formation in Ti-Si alloys</atitle><jtitle>Materials characterization</jtitle><date>2006-03-01</date><risdate>2006</risdate><volume>56</volume><issue>2</issue><spage>107</spage><epage>111</epage><pages>107-111</pages><issn>1044-5803</issn><eissn>1873-4189</eissn><abstract>Ti-13DDT5Si and Ti-25Si (at.%) alloys have been arc-melted from high-purity raw materials, using a water-cooled copper hearth, a non-consumable tungsten electrode, and under an Ar atmosphere gettered by titanium. The cast ingots were then heat-treated for 90 h at 1000 and 1100 DDGC in an inert atmosphere, and both the as-cast and the heat-treated alloys were characterized using scanning electron microscopy and an energy dispersive microanalysis system. The as-cast Ti-13DDT5Si alloy presented a eutectic microstructure composed of the TiSS and Ti5Si3 phases, while the microstructure of the as-cast Ti-25Si alloy showed the presence of large primary precipitates of Ti5Si3 in a eutectic matrix of TiSS and Ti5Si3. Subsequent heat treatment at 1100 DDGC produced no significant microstructural modifications in the Ti-25Si alloy, and it is suggested that the presence of the large primary precipitates of Ti5Si3 contributed to a reduction in the kinetics of Ti3Si formation. 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| source | Elsevier ScienceDirect Journals |
| subjects | Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physics Solidification |
| title | On the peritectoid Ti3Si formation in Ti-Si alloys |
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