Study of high temperature wetting and infiltration for optimising liquid phase sintering in low alloy steels
Study of high temperature wetting and infiltration for optimising liquid phase sintering in low alloy steels
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DOI：
10.1179/1743290111y.0000000007
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发表时间：
2012-07
影响因子：
1.4
通讯作者：
R. Oro;Mónica Campos;J. M. Torralba
中科院分区：
文献类型：
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作者：
R. Oro;Mónica Campos;J. M. Torralba
液相烧结常用于粉末冶金中，通过致密化来改善物理性能。为了结合液相烧结的优点和使用有前途的合金元素（如Mn和Si），设计了具有复杂成分的液体促进剂，以提供低熔点以形成低于常见烧结温度的液相。从接触角、扩散演化和渗透等方面对这些液相的性质进行了表征。采用kr<s:2> ss液滴形貌分析系统，分别对烧结铁试样和生铁试样进行润湿角实验和浸润实验。讨论是基于这些液体与铜相比所发现的不同特征，铜是一种众所周知的用于改善低合金钢性能的液相成形剂。结合ThermoCalc和DICTRA软件分析进行了热力学和动力学过程的模拟。
Liquid phase sintering is commonly used in powder metallurgy to improve physical properties through densification enhancement. With the aim of combining the advantages of liquid phase sintering and the use of promising alloying elements such as Mn and Si, liquid promoters with complex compositions were designed to provide a low melting point to form a liquid phase below the common sintering temperatures. The properties of these liquid phases were characterised in terms of contact angle, spreading evolution and infiltration. Using a Krüss drop shape analysis system, both wetting angle experiments and infiltration experiments were performed by changing the substrate characteristics from sintered to green iron specimens respectively. The discussion is based on the different features found for these liquids compared with copper, which is a well known liquid phase former used for improving the properties of low alloy steels. Simulations of the thermodynamic and kinetic processes taking place were performed by combining ThermoCalc and DICTRA software analysis.