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Spray forming

About: Spray forming is a research topic. Over the lifetime, 1153 publications have been published within this topic receiving 12869 citations. The topic is also known as: spray casting & spray deposition.


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Patent
10 May 2017
TL;DR: In this article, a method for preparing multi-phase reinforced ferrite alloy is presented, which solves the problems of low efficiency and high content of metal and nonmetallic inclusions when a traditional mechanical alloying process is used for preparing a dispersion-strengthened material.
Abstract: The invention relates to a method for preparing multi-phase reinforced ferrite alloy and belongs to the technical field of metal dispersion strengthening. A technological process is that firstly, an alloy ingot is purified by adopting a vacuum melting+electroslag remelting double process; spray forming is performed on the purified alloy ingot, mixed gas of inert high pressure gas and oxygen is taken as an atomizing medium, the content of introduced oxygen is controlled through adjusting oxygen partial pressure in the atomizing medium, and an oxygen element is provided for the formation of oxides in the alloy; an alloy blank is thermally extruded, oxidization films on the surfaces of powder particles are crushed in the thermal extrusion process and are distributed again, and the oxygen element is preferentially combined with rare earth elements Y and Ti to form a Y-O or Y-Ti-O oxide dispersion phase. The obtained ferrite alloy is jointly strengthened by an L21 type Ni2AlMn inter-metallic compound, a NiAl inter-metallic compound, a Cu-rich precipitate and the oxide dispersion phase. The method provided by the invention solves the problems of low efficiency and high content of metal and nonmetallic inclusions when a traditional mechanical alloying process is used for preparing a dispersion-strengthened material, so that the comprehensive mechanical properties of the material are improved.

4 citations

Journal ArticleDOI
TL;DR: In this article , the authors summarized the advantages of cold spray (CS) techniques for applying hydroxyapatite (HAp) coatings to biomedical implants, including substituted-HAp and poly-mer composites, and their applications in bone tissue engineering.
Abstract: The standard method for applying hydroxyapatite (HAp) coatings to biomedical implants is plasma spraying. However, due to the high temperature of the plasma, these coatings frequently experience negative effects like evaporation, phase change, de-bonding, gas release, and residual stresses. This paper summarizes a revolutionary technique known as a cold spray (CS), which allows HAp coatings to be applied at temperatures well below their melting point. CS has several advantages over conventional high-temperature technologies, and it seems to be approaching parity with other older methods. When applied using the CS approach, the HAp coatings enhance bioactivity, increase corrosion resistance, and main­tain the characteristics of calcium phosphate ceramics. This study aims to give a concise and comprehensive overview of HAp-based materials, including substituted-HAp and HAp/poly­mer composites, and their applications in bone tissue engineering. To better understand the advantages of CS technology, a comparison of CS, high-velocity oxy-fuel (HVOF), and plasma spray is given at the end. The perspective and difficulties were also highlighted.

4 citations

Journal Article
TL;DR: In this article, a brief review of the research and development of traditional packaging materials is given, and Si-Al(50~70wt%Si) alloys were fabricated by spray forming.
Abstract: A brief review of the research and development of the traditional packaging materials is given. In this study, Si-Al(50~70wt%Si)alloys were fabricated by spray forming. The spray-formed alloys with high Si contents show fine and homogeneous microstructures, and especially they have, at the same time, lower thermal expansion coefficients, high heat conductivity and lower density compared with the traditional packaging materials.

4 citations

01 Jan 2001
TL;DR: In this paper, a very homogeneously formed microstructure of a ball bearing steel (100Cr6) and a high-speed steel (HS6-5-2C) was shown to avoid pores by high consolidation and the elimination of macro-segregations.
Abstract: Spray forming is known as a production procedure recently developed for technical materials, specially for the production of high-grade steels. The advantages of disintegration of the pouring into small droplets associated with rapid cooling leads to remarkable improvements of homogeneity by forming the primary microstructure in comparison to conventionally cast material. These goals are also found in all semi-finished products after thermo-mechanical treatments. Studies of the very homogeneously formed microstructure of a ball bearing steel (100Cr6) and a high-speed steel (HS6-5-2C) show also the avoiding of pores by high consolidation and the elimination of macro-segregations.

4 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202310
202216
202117
202037
201933
201826