Sintering properties of nanosized 90W–7Ni–3Fe composite powder
Source abstract
Abstract
In order to study the sintering properties of nanosized 90W–7Ni–3Fe composite powder synthesized by spray drying-hydrogen reduction process, melting point and phase changes of nanometer 90W–7Ni–3Fe composite powder whose average particle sizes were in the range from 60 to 91 nm were measured by DTA, and sintering characteristic of specimens was studied at different sintering temperatures and times. Fracture morphology and W grain sizes of sintered specimens were measured by SEM and optical micrograph, respectively. Relative density, tensile strength and elongation of sintered specimens were also measured and analysed. The sintering temperature is lower than 80 °C in comparison traditional 90W–Ni–Fe powder. Mechanical properties are low because of appearance of cavities and vapour due to high oxygen content of nanosized 90W–7Ni–3Fe composite powder during liquid sintering.
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Research context
OpenAlex topics: Advanced materials and composites · High-Temperature Coating Behaviors · Powder Metallurgy Techniques and Materials
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