A Limit to Accelerated Free-Sintering: Nano-Phase Separation Interferes With Organic Debinding
نویسندگان
چکیده
Abstract Nano-phase separating Ni–12 at. pct Ag powders are processed via high-energy ball milling and brought into a supersaturated state with reduction of the grain size to nanocrystalline scale, combination that is designed encourage rapid densification by phase separation upon heating. This unstable powder then characterized dilatometry, in-situ x-ray diffraction, thermogravimetry microstructure analysis for sintering cycles up 940 °C. However, these compacts exhibit excessive pore evolution significant macroscopic swelling caused removal organic process additives. competition known in metals, but present study adds an additional dimension separation, which shifts dominant mechanism as formation second traps volatilizing organics hinders debinding process. The creep overall loss relative density dominated deformation phase. interference between low-temperature onset consolidation represents new challenge efforts aimed at free should guide design rapidly alloys; specifically, work emphasizes need select alloys have their sintering-accelerating temperature above range where gases evolved.
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ژورنال
عنوان ژورنال: Metallurgical and Materials Transactions
سال: 2023
ISSN: ['1073-5623', '1543-1940']
DOI: https://doi.org/10.1007/s11661-023-07152-3