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Oxide coated powder with core-shell structure as well as preparation method and application thereof
The invention provides oxide coated powder with a core-shell structure as well as a preparation method and application thereof, and belongs to the technical field of powder metallurgy. The invention provides a preparation method of oxide coated powder with a core-shell structure. The preparation method comprises the following steps: injecting helium and argon into a plasma generator to generate helium-argon mixed plasma; and mixing the powder with the helium-argon mixed plasma, and injecting the mixture into water for auto-oxidation to obtain the oxide coated powder with the core-shell structure. The helium-argon mixed plasma prepared by adopting the plasma generator has the characteristics of an ultrahigh temperature, high speed, high activity, high conductivity and the like, can heat the powder, then is injected into water, and can react with water or generate oxidation reaction with oxygen dissolved in the water, so that densification and homogenization of the oxide shell layer are facilitated, the combination degree is high, the matching performance is high, and good application prospects are achieved; and moreover, the process is simple, and continuous large-scale production can be realized.
本发明提供了一种具有核壳结构的氧化物包覆粉体及其制备方法和应用，属于粉末冶金技术领域。本发明提供的具有核壳结构的氧化物包覆粉体的制备方法，包括以下步骤：将氦气和氩气注入等离子体发生器中产生氦‑氩混合等离子体；将粉体与所述氦‑氩混合等离子体混合后射入水中进行自氧化，得到具有核壳结构的氧化物包覆粉体。本发明采用等离子体发生器制备的氦‑氩混合等离子体具有超高温、高速、高活性、高导电等特性，能够对粉体进行加热，然后再射入水中，能够与水反应或者与水中溶解的氧气发生氧化反应，有利于实现氧化物壳层的致密化、均匀化、结合度高、匹配性强，具有很好的应用前景；而且，工艺简单，能够实现连续化规模化生产。
Oxide coated powder with core-shell structure as well as preparation method and application thereof
The invention provides oxide coated powder with a core-shell structure as well as a preparation method and application thereof, and belongs to the technical field of powder metallurgy. The invention provides a preparation method of oxide coated powder with a core-shell structure. The preparation method comprises the following steps: injecting helium and argon into a plasma generator to generate helium-argon mixed plasma; and mixing the powder with the helium-argon mixed plasma, and injecting the mixture into water for auto-oxidation to obtain the oxide coated powder with the core-shell structure. The helium-argon mixed plasma prepared by adopting the plasma generator has the characteristics of an ultrahigh temperature, high speed, high activity, high conductivity and the like, can heat the powder, then is injected into water, and can react with water or generate oxidation reaction with oxygen dissolved in the water, so that densification and homogenization of the oxide shell layer are facilitated, the combination degree is high, the matching performance is high, and good application prospects are achieved; and moreover, the process is simple, and continuous large-scale production can be realized.
本发明提供了一种具有核壳结构的氧化物包覆粉体及其制备方法和应用，属于粉末冶金技术领域。本发明提供的具有核壳结构的氧化物包覆粉体的制备方法，包括以下步骤：将氦气和氩气注入等离子体发生器中产生氦‑氩混合等离子体；将粉体与所述氦‑氩混合等离子体混合后射入水中进行自氧化，得到具有核壳结构的氧化物包覆粉体。本发明采用等离子体发生器制备的氦‑氩混合等离子体具有超高温、高速、高活性、高导电等特性，能够对粉体进行加热，然后再射入水中，能够与水反应或者与水中溶解的氧气发生氧化反应，有利于实现氧化物壳层的致密化、均匀化、结合度高、匹配性强，具有很好的应用前景；而且，工艺简单，能够实现连续化规模化生产。
Oxide coated powder with core-shell structure as well as preparation method and application thereof
一种具有核壳结构的氧化物包覆粉体及其制备方法和应用
HE JINGYAO (author) / LIU YANBO (author) / BAI YIFAN (author)
2021-08-31
Patent
Electronic Resource
Chinese
IPC:
B22F
Verarbeiten von Metallpulver
,
WORKING METALLIC POWDER
/
B33Y
ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
,
Additive (generative) Fertigung, d. h. die Herstellung von dreidimensionalen [3D] Bauteilen durch additive Abscheidung, additive Agglomeration oder additive Schichtung, z. B. durch 3D- Drucken, Stereolithografie oder selektives Lasersintern
/
C04B
Kalk
,
LIME
B4C-coated Mg2B2O5 core-shell structure ceramic powder and preparation method thereof
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