Characteristics and Microstructure Evolution of Spherical NbMoTaWZr-HfC Powders Fabricated by Spray Granulation Combined with Plasma Spheroidization

被引：0

作者：

Gu Tao ^{[1
,2
]}

Wang Limin ^{[1
]}

Hu Qiang ^{[1
]}

Liang Xiubing ^{[3
]}

Fu Dongxing ^{[2
]}

Chen Yongxiong ^{[3
]}

Zhao Xinming ^{[4
]}

Sheng Yanwei ^{[4
]}

机构：

[1] GRIPM Adv Mat Co Ltd, Beijing 100088, Peoples R China

[2] Gen Res Inst Nonferrous Met, Beijing 100088, Peoples R China

[3] Acad Mil Sci PLA China, Natl Innovat Inst Def Technol, Beijing 100071, Peoples R China

[4] GR1NM Addit Mfg Technol Co Ltd, Beijing 101407, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2023年 / 52卷 / 06期

关键词：

spray granulation; plasma spheroidization; spherical powder; NbMoTaWZr-HfC composite; MECHANICAL-PROPERTIES; SOLIDIFICATION; TEMPERATURE; MORPHOLOGY; PARTICLES; TUNGSTEN; PROGRESS; ALUMINA; SIZE; GAS;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

NbMoTaWZr-HfC spherical powder was fabricated by spray granulation combined with radio frequency plasma spheroidization. The macroscopic characteristics, phase composition and microstructure of the powder are studied. The results reveal that the composite powder is spherical and the particle size ranges from 13.31 mu m to 32.11 mu m with D-50=19.62 mu m. The sphericity, flow rate and bulk density of the spheroidized powder are 0.98, 0.198 s/g, 7.20 g/cm(3). Moreover, the main phases of NbMoTaWZr-HfC spherical powder are body-centered-cubic (bcc) solid solution+ZrO2+HfC phase and it has dendritic and cellular structure. The element distribution in the spherical NbMoTaWZr-HfC powder is uniform. However elemental segregation occurs in the dendritic scale region; high melting point elements such as W, Mo, and Ta are enriched in the dendrite arm, low melting point elements such as Nb and Zr are enriched at the interdendritic region, and the Hf are uniformly distributed.

引用

页码：2161 / 2168

页数：8

共 36 条

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