Effect of Material and Process Atmosphere in the Preparation of Al-Ti-B Grain Refiner by SHS
Al-Ti-B master alloys are widely used in the aluminum industry as grain refiners for the control of the microstructure of the aluminum alloys. The SHS (self-propagating high-temperature synthesis) is an ex situ method that uses exothermic reactions to sustain the chemical reaction in a combustion wa...
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MDPI AG
2015-07-01
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| Series: | Metals |
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| Online Access: | http://www.mdpi.com/2075-4701/5/3/1387 |
| _version_ | 1818192432932585472 |
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| author | Iban Vicario Angeline Poulon-Quintin Miguel Angel Lagos Jean-François Silvain |
| author_facet | Iban Vicario Angeline Poulon-Quintin Miguel Angel Lagos Jean-François Silvain |
| author_sort | Iban Vicario |
| collection | DOAJ |
| description | Al-Ti-B master alloys are widely used in the aluminum industry as grain refiners for the control of the microstructure of the aluminum alloys. The SHS (self-propagating high-temperature synthesis) is an ex situ method that uses exothermic reactions to sustain the chemical reaction in a combustion wave. The advantages of SHS are the low energy requirement, simplicity and product purity. However, the raw material used has to be very pure, with a very small size leading to the necessity of a reactor with a protective gas to produce the reaction. The purpose of this investigation is to fabricate SHS master alloys with commercial standard raw materials, with lower purity and higher grain size without a reactor or protective gas in order to (1) decrease the price and (2) improve the productivity of master alloy manufacturing. The possibility of using cheap borated salts instead of expensive pure boron has been studied. Different compositions of aluminum master alloy have been developed. Bigger TiB2 grain size has been obtained when using bigger commercial raw materials. Larger titanium powder can produce an aluminum master alloy with a maximum of 30% of aluminum without reactor. In comparison, SHS reaction is much more difficult when using finer titanium powder. |
| first_indexed | 2024-12-12T00:30:25Z |
| format | Article |
| id | doaj.art-7d11431e9ac64917a52ac68baafd8bce |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-12T00:30:25Z |
| publishDate | 2015-07-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-7d11431e9ac64917a52ac68baafd8bce2022-12-22T00:44:30ZengMDPI AGMetals2075-47012015-07-01531387139610.3390/met5031387met5031387Effect of Material and Process Atmosphere in the Preparation of Al-Ti-B Grain Refiner by SHSIban Vicario0Angeline Poulon-Quintin1Miguel Angel Lagos2Jean-François Silvain3Tecnalia Research & Innovation. Department of Foundry and Steel making, c/Geldo, Edif. 700, E-48160 Derio, SpainCNRS, University of Bordeaux, ICMCB, UPR 9048, F-33600 Pessac cedex, FranceTecnalia Research & Innovation. Department of Aerospace, c/Mikeletegi 2, E-20009 Donostia–San Sebastián, SpainCNRS, University of Bordeaux, ICMCB, UPR 9048, F-33600 Pessac cedex, FranceAl-Ti-B master alloys are widely used in the aluminum industry as grain refiners for the control of the microstructure of the aluminum alloys. The SHS (self-propagating high-temperature synthesis) is an ex situ method that uses exothermic reactions to sustain the chemical reaction in a combustion wave. The advantages of SHS are the low energy requirement, simplicity and product purity. However, the raw material used has to be very pure, with a very small size leading to the necessity of a reactor with a protective gas to produce the reaction. The purpose of this investigation is to fabricate SHS master alloys with commercial standard raw materials, with lower purity and higher grain size without a reactor or protective gas in order to (1) decrease the price and (2) improve the productivity of master alloy manufacturing. The possibility of using cheap borated salts instead of expensive pure boron has been studied. Different compositions of aluminum master alloy have been developed. Bigger TiB2 grain size has been obtained when using bigger commercial raw materials. Larger titanium powder can produce an aluminum master alloy with a maximum of 30% of aluminum without reactor. In comparison, SHS reaction is much more difficult when using finer titanium powder.http://www.mdpi.com/2075-4701/5/3/1387grain refinerself-propagating high-temperature synthesisaluminumflux |
| spellingShingle | Iban Vicario Angeline Poulon-Quintin Miguel Angel Lagos Jean-François Silvain Effect of Material and Process Atmosphere in the Preparation of Al-Ti-B Grain Refiner by SHS Metals grain refiner self-propagating high-temperature synthesis aluminum flux |
| title | Effect of Material and Process Atmosphere in the Preparation of Al-Ti-B Grain Refiner by SHS |
| title_full | Effect of Material and Process Atmosphere in the Preparation of Al-Ti-B Grain Refiner by SHS |
| title_fullStr | Effect of Material and Process Atmosphere in the Preparation of Al-Ti-B Grain Refiner by SHS |
| title_full_unstemmed | Effect of Material and Process Atmosphere in the Preparation of Al-Ti-B Grain Refiner by SHS |
| title_short | Effect of Material and Process Atmosphere in the Preparation of Al-Ti-B Grain Refiner by SHS |
| title_sort | effect of material and process atmosphere in the preparation of al ti b grain refiner by shs |
| topic | grain refiner self-propagating high-temperature synthesis aluminum flux |
| url | http://www.mdpi.com/2075-4701/5/3/1387 |
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