Powder Metallurgical Processing and Development of Functional Composites

粉末冶金加工及功能复合材料的开发

基本信息

批准号：
11221203
负责人：
WATANABE Ryuzo
金额：
$ 50.11万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11221203/
关键词：
harmonic design of composite particle assembling monodisperse particles orifice ejection method thermoelectric materials piezoelectric materials powder slurry process spark plasma sintering パーコレーション制御ノイズ解析

项目摘要

1. Preparation of monodisperse particles : The pulsated-orifice-ejection apparatus for the production of monodisperse particles was devised, and the formation details of the spherical alloy particles were clarified. 2. Function control of particle assembly : The relation between the configuration structure and the function manifestation were studied with particular emphasis on percolation and functionally graded structures. The electrical conductivity, as well as thermoelectric property, was confirmed to manifest by arraying as many as 1000 particles. 3. Particle assembling experiment : Several assembling methods such as picking up with a suction pen, flowing onto a configuration template and linear arraying into a vertical tube, were tested for an effective assemblage of spherical particles, and the manipulating specifications for each of the methods were established. 4. Composite structure formation by the slurry dispensing assemblage : A method dispensing particle slurry and arrayin … More g onto a plate to form a pre-designed composite structure configuration was devised. This method was confirmed to have several advantages for the formation of composite structures, in that it enables us to directly from a three dimensional composite structure and also give us possibilities of various materials selection and combination. 5. Bonding of the arrayed particles and function of the assemblage : Four kinds of bonding were identified for the interparticle bonding, and their formation mechanisms were clarified. The Seebeck coefficient of a linear particle assemblage of Bi-Sb alloy was measured, and a value comparable to that for single crystal was obtained. 6. Functional grading of piezoelectric ceramics : The bending characteristics of unimorph and bimorph actuators with functionally graded structures were evaluated, and we confirmed that they have sufficient bending displacement with a bonding integrity. 7. Composite structure of Al_2O_3-YAG ceramics : A eutectic alloy type of Al_2O_3-YAG ceramics was prepared by spark-plasma sintering. An isometric microstructure was found to be formed, and the products showed good high temperature strength. Less

1. 单分散颗粒的制备：设计了用于生产单分散颗粒的脉动孔喷射装置，并阐明了球形合金颗粒的形成细节。 2. 颗粒聚集的功能控制：形态结构与颗粒之间的关系。研究了功能表现，特别强调渗透和功能梯度结构，并确认通过排列尽可能多的材料来表现出导电性和热电性能。 3. 颗粒组装实验：测试了吸笔拾取、流到构型模板上、线性排列到垂直管中等多种组装方法，以实现球形颗粒的有效组装，以及每种组装方法的操作规范。 4. 通过浆料分配组件形成复合结构：一种将颗粒浆料分配到板上的方法。设计了形成预先设计的复合结构配置的方法，该方法被证实对于形成复合结构具有多个优点，因为它使我们能够直接形成三维复合结构，并且还为我们提供了各种材料选择和组合的可能性。 5. 排列粒子的键合和集合体的功能：确定了四种粒子间键合，并阐明了它们的形成机制。 6. 压电陶瓷的功能分级：对具有功能分级结构的单压电晶片和双压电晶片执行器的弯曲特性进行了评估，并确认它们具有足够的弯曲位移。 7.Al_2O_3-YAG陶瓷的复合结构：采用火花等离子体法制备了共晶合金型Al_2O_3-YAG陶瓷。发现形成等轴微观结构，并且产品表现出良好的高温强度。