Surface Oxides on Metal Powders: An Overview of the Effect of Alloy Composition and Manufacturing Method

机译：金属粉末上的表面氧化物：合金成分和制造方法的影响概述

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The quality and usefulness of powder are strongly determined by the surface composition of the powder. Amount of oxides, their composition and spatial distribution on the powder surface and within a particle determine the requirements for the subsequent consolidation process.This paper summarizes possibilities of qualitative and quantitative analysis of powder surface chemistry by a variety of methods, starting from surface-sensitive chemical analyses by XPS, AES, HR SEM coupled with EDX and FIB, and modern thermoanalytical techniques. Effect of the different powder manufacturing methods (water and gas atomisation, EIGA, etc.), alloy composition (low alloyed steels, stainless steels, Ni-based super-alloys, Ti-alloys, etc.) and powder handling on the surface composition of the powder is summarized. A generic model of the oxide distribution depending on the alloy composition and manufacturing method is developed. Typically powder particles are covered by homogeneous oxide layer of the main alloying elements and particulate features, formed by stable high-temperature oxides.

机译：粉末的质量和实用性很大程度上取决于粉末的表面组成。粉末表面以及颗粒内部的氧化物含量，其组成和空间分布决定了后续固结过程的要求。本文总结了从表面敏感开始，通过各种方法对粉末表面化学进行定性和定量分析的可能性。通过XPS，AES，HR SEM与EDX和FIB结合进行化学分析，以及现代热分析技术。不同粉末制造方法（水和气体雾化，EIGA等），合金成分（低合金钢，不锈钢，Ni基超级合金，Ti合金等）以及粉末处理对表面成分的影响粉末的总结。建立了取决于合金成分和制造方法的氧化物分布的通用模型。通常，粉末颗粒被主要合金元素的均匀氧化物层和由稳定的高温氧化物形成的颗粒特征所覆盖。

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来源
《World PM2016 Congress;European Powder Metallurgy Association》|2016年|1-6|共6页
会议地点 Hamburg(DE)
作者
Eduard Hryha; Lars Nyborg;
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作者单位

Chalmers University of Technology Department of Materials and Manufacturing Technology Rännvägen 2A SE-412 96 Gothenburg Sweden hryha@chalmers.se;

Chalmers University of Technology Department of Materials and Manufacturing Technology Rännvägen 2A SE-412 96 Gothenburg Sweden lars.nyborg@chalmers.se;

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powder characterization; ; surface oxide; ; particulate oxide features; ; oxide reduction;

机译：粉末表征;表面氧化物;颗粒氧化物特征； ;氧化还原;

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Surface Oxides on Metal Powders: An Overview of the Effect of Alloy Composition and Manufacturing Method

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