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A preparation method of nano samarium zirconate powder used for additive manufacturing feed

A technology of additive manufacturing and samarium zirconate, applied in the field of nano-powder preparation, can solve the problems of unavailable ceramic powder, complex process, unfavorable large-scale production, etc., achieve stable phase structure, less process flow, Ease of large-scale industrial production

Active Publication Date: 2017-02-01
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the current method for preparing zirconate powder cannot obtain ceramic powder that can be used for spraying, the process is complicated, it is not conducive to large-scale industrial production, and the prepared powder often has more hard agglomerations In order to solve the technical problems of the body, a method for preparing nano-samarium zirconate powder used for additive manufacturing feedstock is provided

Method used

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  • A preparation method of nano samarium zirconate powder used for additive manufacturing feed
  • A preparation method of nano samarium zirconate powder used for additive manufacturing feed
  • A preparation method of nano samarium zirconate powder used for additive manufacturing feed

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specific Embodiment approach 1

[0040] Embodiment 1: This embodiment is a method for preparing nano-samarium zirconate powder used for additive manufacturing feed, specifically carried out according to the following steps:

[0041] 1. Preparation of mixed slurry: mix and ball mill deionized water and nano-mixed powder for 12 hours to obtain mixed slurry I; the nano-mixed powder is nanometer Sm 2 o 3 with nano ZrO 2 A mixture of which, nano Sm 2 o 3 with nano ZrO 2 The mol ratio is 1:2; The mass fraction of deionized water in the mixed slurry I is 40%~50%;

[0042] 2. Spray drying: spray-dry the obtained mixed slurry I to obtain mixed powder I; the rotational speed of the atomizing disc during the spray-drying is 24900r·min -1 ~25100r·min -1 , the inlet temperature is 217°C-223°C, the outlet air temperature is 109°C-111°C, and the slurry feeding rate is 5.1L·min -1 ~5.7L·min -1 ;

[0043] 3. High-temperature solid-phase sintering: The mixed powder I obtained in step 2 is subjected to high-temperature...

specific Embodiment approach 2

[0047] Specific embodiment two: the difference between this embodiment and specific embodiment one is: what the ball milling described in step one used is ZrO 2 Grinding balls. Others are the same as the first embodiment.

specific Embodiment approach 3

[0048] Specific embodiment three: the difference between this embodiment and specific embodiment two is: ZrO described in step one 2 The grinding ball is made of ZrO with a diameter of 7mm 2 Grinding balls, ZrO with a diameter of 8mm 2 Grinding balls and ZrO with a diameter of 10mm 2 Mixed grinding balls made by mixing grinding balls. Others are the same as in the second embodiment.

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Abstract

The invention provides a method for preparing nano samarium zirconate powder used for additive manufacturing and feeding and relates to a method for preparing nano powder for additive manufacturing and feeding. The method aims at solving the technical problems that ceramic powder capable of being used for spraying can not be obtained through an existing zirconate powder preparation method, the technological process is complex, industrial large-scale production is not facilitated, and prepared powder always has many hard aggregation bodies. The method includes the first step of mixed slurry preparing, the second step of mist spraying and drying, the third step of high-temperature solid-phase sintering, the fourth step of secondary ball milling, the fifth step of mist spraying and drying and the sixth step of plasma processing. The method is applied to additive manufacturing, particularly the technical field of thermal spraying.

Description

technical field [0001] The invention relates to a method for preparing nanometer powder used for additive manufacturing feed. Background technique [0002] SM 2 Zr 2 o 7 (SZ) material has good high-temperature chemical stability, strong sintering resistance, no phase change at high temperature, low thermal conductivity, and a higher thermal expansion coefficient than La with the same crystal structure. 2 Zr 2 o 7 Large, studies have shown that Ce doping can further reduce its thermal conductivity, Sm 2 Zr 2 o 7 It is an important class of structural ceramics and functional ceramic materials, and it is also one of the important candidate materials for thermal barrier coatings. [0003] SM 2 Zr 2 o 7 Although the material has excellent thermodynamic properties, the fatal weakness of using it as a candidate material for thermal barrier coatings is that the thermal expansion coefficient is still small (room temperature to 1200°C) and the fracture toughness is low. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/00C04B35/50C04B35/48C04B35/626
CPCC01G25/00C01G25/006C01P2002/72C01P2004/03C01P2004/61C01P2006/10C01P2006/11C01P2006/90C04B35/48C04B35/50C04B35/626C04B2235/3224C04B2235/3229
Inventor 王铀崔钟元刘勇刘赛月王亮
Owner HARBIN INST OF TECH
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