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Flash Sintering of Composite Ceramic Materials and Structures

复合陶瓷材料和结构的闪速烧结

基本信息

批准号：
EP/R029873/1
负责人：
Claire Dancer
金额：
$ 24.78万
依托单位：
University of Warwick
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2018
资助国家：
英国
起止时间：
2018 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FR029873%2F1
关键词：
Flash Sintering Composite Ceramic Materials

项目摘要

Ceramic materials are used in a wide range of applications including motion sensors, for energy storage in electric vehicles, dental replacement, hip and knee implants, cutting blades, and body and vehicle armour. They are exceptionally durable, even at high temperatures and in corrosive environments, and can be reused or recycled at the end of their life. However the high cost of manufacturing is a major barrier to the use of ceramic materials. Producing a dense strong ceramic material with minimal porosity requires heating to very high temperatures well over 1000 deg.C typically for many hours. Recently scientists have discovered that the temperature and duration of the ceramic densification process (sintering) can be significantly reduced by passing an electric field through the ceramic during the heating process. This "flash sintering" process, so-called because the material densifies extremely rapidly within a few seconds and often with the simultaneous emission of light, has potential to significantly reduce energy use in industrial-scale ceramic manufacturing and reduce emissions of greenhouse gases from the process by up to 40%. The flash sintering technique may revolutionise the ceramic manufacturing industry by reducing the cost and environmental impact of producing ceramic materials.In this research project a detailed investigation of the flash sintering method will be undertaken to establish the viability of this technique for use with a wide range of ceramic materials and particularly to understand the underlying mechanisms which cause the flash sintering effect. A flexible flash sintering facility will be established which can be used to flash sinter a wide range of ceramic materials. Composite materials with varying electrical conductivity will be flash sintered under different conditions. The results will used to understand the effect of both the material properties and the variables involved in the process (e.g. electric field strength, current, voltage, and temperature) on the observed flash sintering behaviour. Materials will be characterised by measuring their density, imaging using scanning electron microscopy and mapping the chemical composition, and using X-ray diffraction to determine any changes to the phase composition of the materials caused by the flash sintering process. New insights will be gained by flash sintering for the first time a structure made of layers of ceramic composite materials graded by composition and examining how the flash sintering behaviour changes compared to samples containing each individual composition. The results of this project will be used by our industrial project partners Lucideon and Morgan Advanced Materials in the industrial development and application of flash sintering technology.

陶瓷材料应用广泛，包括运动传感器、电动汽车储能、牙科替换、髋关节和膝关节植入物、切割刀片以及防弹衣和车辆装甲。即使在高温和腐蚀性环境下，它们也非常耐用，并且在使用寿命结束时可以重复使用或回收。然而，高昂的制造成本是陶瓷材料使用的主要障碍。生产具有最小孔隙率的致密、坚固的陶瓷材料需要加热到远高于 1000 摄氏度的高温，通常需要持续数小时。最近，科学家发现，在加热过程中使电场穿过陶瓷，可以显着降低陶瓷致密化过程（烧结）的温度和持续时间。这种“快速烧结”工艺之所以称为“闪速烧结”工艺，是因为材料在几秒钟内极其迅速地致密化，并且通常同时发射光，有可能显着减少工业规模陶瓷制造中的能源使用，并将该工艺中的温室气体排放量减少高达 40%。闪速烧结技术可能会通过降低生产陶瓷材料的成本和环境影响来彻底改变陶瓷制造业。在本研究项目中，将对闪速烧结方法进行详细研究，以确定该技术在广泛的陶瓷材料中使用的可行性，特别是了解导致闪速烧结效应的潜在机制。将建立一个灵活的闪速烧结设施，可用于闪速烧结各种陶瓷材料。具有不同电导率的复合材料将在不同条件下进行闪速烧结。结果将用于了解材料特性和过程中涉及的变量（例如电场强度、电流、电压和温度）对观察到的闪速烧结行为的影响。将通过测量材料的密度、使用扫描电子显微镜成像并绘制化学成分图来表征材料，并使用 X 射线衍射来确定由闪速烧结过程引起的材料相成分的任何变化。通过首次快速烧结由按成分分级的陶瓷复合材料层制成的结构，并检查与包含每种成分的样品相比，快速烧结行为如何变化，将获得新的见解。该项目的成果将被我们的工业项目合作伙伴Lucideon和Morgan Advanced Materials用于闪速烧结技术的工业开发和应用。