Details
| Original language | English |
|---|---|
| Article number | 171 |
| Journal | Journal of Manufacturing and Materials Processing |
| Volume | 7 |
| Issue number | 5 |
| Publication status | Published - 19 Sept 2023 |
Abstract
Due to the high specific surface area of titanium aluminide powders, significant and unavoidable surface oxidation takes place during processing. The resulting oxides disrupt the conventional powder metallurgical process route (pressing and sintering) by reducing the green strength and sintered properties. Oxide-free particle surfaces offer the potential to significantly increase particle bond strength and enable the processing of difficult-to-press material powders. In this work, the effect of milling titanium aluminide powder in a silane-doped atmosphere on the component properties after pressing and the subsequent sintering was investigated. Ball milling was used to break up the oxide layers and create bare metal surfaces on the particles. With the help of silane-doped inert gas, the oxygen partial pressure was greatly reduced during processing. It was investigated whether oxide-free surfaces could be produced and maintained by milling in silane-doped atmospheres. Furthermore, the resulting material properties after pressing and sintering were analysed using density measurements, hardness tests, EDX measurements, and micrographs. It was concluded that ball milling in a silane-doped atmosphere produces and maintains oxide-free particle surfaces. These oxide-free surfaces and smaller particle sizes improve the component properties after pressing and sintering.
Keywords
- die pressing and sintering, powder metallurgical process, titanium aluminide powder
ASJC Scopus subject areas
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Journal of Manufacturing and Materials Processing, Vol. 7, No. 5, 171, 19.09.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Pressing and Sintering of Titanium Aluminide Powder after Ball Milling in Silane-Doped Atmosphere
AU - Behrens, Bernd-Arno
AU - Brunotte, Kai
AU - Peddinghaus, Julius
AU - Ursinus, Jonathan
AU - Döring, Sebastian
AU - Maus-Friedrichs, Wolfgang
AU - Gustus, René
AU - Szafarska, Maik
N1 - Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—Project-ID 394563137—SFB 1368 TP A03 and TP S01.
PY - 2023/9/19
Y1 - 2023/9/19
N2 - Due to the high specific surface area of titanium aluminide powders, significant and unavoidable surface oxidation takes place during processing. The resulting oxides disrupt the conventional powder metallurgical process route (pressing and sintering) by reducing the green strength and sintered properties. Oxide-free particle surfaces offer the potential to significantly increase particle bond strength and enable the processing of difficult-to-press material powders. In this work, the effect of milling titanium aluminide powder in a silane-doped atmosphere on the component properties after pressing and the subsequent sintering was investigated. Ball milling was used to break up the oxide layers and create bare metal surfaces on the particles. With the help of silane-doped inert gas, the oxygen partial pressure was greatly reduced during processing. It was investigated whether oxide-free surfaces could be produced and maintained by milling in silane-doped atmospheres. Furthermore, the resulting material properties after pressing and sintering were analysed using density measurements, hardness tests, EDX measurements, and micrographs. It was concluded that ball milling in a silane-doped atmosphere produces and maintains oxide-free particle surfaces. These oxide-free surfaces and smaller particle sizes improve the component properties after pressing and sintering.
AB - Due to the high specific surface area of titanium aluminide powders, significant and unavoidable surface oxidation takes place during processing. The resulting oxides disrupt the conventional powder metallurgical process route (pressing and sintering) by reducing the green strength and sintered properties. Oxide-free particle surfaces offer the potential to significantly increase particle bond strength and enable the processing of difficult-to-press material powders. In this work, the effect of milling titanium aluminide powder in a silane-doped atmosphere on the component properties after pressing and the subsequent sintering was investigated. Ball milling was used to break up the oxide layers and create bare metal surfaces on the particles. With the help of silane-doped inert gas, the oxygen partial pressure was greatly reduced during processing. It was investigated whether oxide-free surfaces could be produced and maintained by milling in silane-doped atmospheres. Furthermore, the resulting material properties after pressing and sintering were analysed using density measurements, hardness tests, EDX measurements, and micrographs. It was concluded that ball milling in a silane-doped atmosphere produces and maintains oxide-free particle surfaces. These oxide-free surfaces and smaller particle sizes improve the component properties after pressing and sintering.
KW - die pressing and sintering
KW - powder metallurgical process
KW - titanium aluminide powder
UR - http://www.scopus.com/inward/record.url?scp=85175239368&partnerID=8YFLogxK
U2 - 10.3390/jmmp7050171
DO - 10.3390/jmmp7050171
M3 - Article
VL - 7
JO - Journal of Manufacturing and Materials Processing
JF - Journal of Manufacturing and Materials Processing
IS - 5
M1 - 171
ER -