Flash Sintering of Non-Oxide Ceramics for Armour

装甲用非氧化物陶瓷的闪速烧结

• 批准号: 1937671
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1937671
• 关键词: Flash; Sintering; Non; Oxide; Ceramics

Context and impact. The most effective armour systems for military personnel rely on plates of non-oxide ceramics such as SiC to defeat incoming projectiles. These ceramics are expensive and difficult to produce because temperatures of ~2000C, often with the simultaneous application of pressure, are needed to densify them. We have recently shown, however, that SiC can be densified without pressure at furnace temperatures less than 1200C in just a few seconds in a new process known as "flash sintering" in which an electric field is applied to the ceramic during sintering. Use of this to produce armour has the potential to reduce the cost of the armour (less energy used, cheaper furnaces, pressure not needed) and to produce more complex shapes (the requirement for applied pressure in conventional processing means only simple shapes are possible). There is also the possibility that improved microstructures and properties might be achieveable. Aims and objectives. The aim of this project is to understand the mechanisms responsible for these remarkable improvements in sintering and hence to establish the advantages in cost, ballistic performance and manufacturing versatility for armour manufacture. The research will involve ceramic processing via flash sintering, microstructural characterisation and mechanical and ballistic testing.Novelty. ISI Web of Knowledge lists on 6 papers on the flash sintering of SiC, 3 of which are by the present supervisor. This illustrates the fact that the essential novelty is in the process of flash sintering non-oxides itself. All information on how it works and what the microstructure and properties of the sintered ceramics are like is novel.Alignment with EPSRC's strategies and research areas. The proposal is very well aligned with the "Productive Nation" heading of the EPSRC Delivery Plan, which aims to "introduce the next generation of innovative and disruptive technologies" by means of "advanced materials research to drive new processes, products and sustainable solutions". It also fits well with the Research Areas "Manufacturing Technologies" and "Materials Engineering - Ceramics" in the Manufacturing the Future Theme and "Energy Efficiency" in the Energy theme. Companies and collaborators. The project is an iCASE award with Dstl as the industrial sponsor. Their main contributions will be guidance of the direction of the project and direct collaboration on ballistic testing of materials produced. There will also be collaboration via Dstl with Kennametal (Newport) who own SPS/hot pressing equipment involving field assisted processing of SiC which was part paid for by Dstl. Possible collaboration with academics with interests in flash sintering (e.g. Prof. M.J. Reece, QMUL) is also anticipated.NCE for this voucher made in error - end date of 31/01/22 correct.

背景和影响。军事人员最有效的装甲系统依赖于非氧化物陶瓷板，如SiC，以抵御来袭的射弹。这些陶瓷昂贵且难以生产，因为需要约2000 ℃的温度，通常同时施加压力以使其致密化。然而，我们最近已经表明，在一种称为“快速烧结”的新工艺中，SiC可以在低于1200 ℃的炉温下在几秒钟内在没有压力的情况下致密化，在该工艺中，在烧结过程中向陶瓷施加电场。使用这种材料生产装甲有可能降低装甲的成本（使用更少的能源，更便宜的熔炉，不需要压力），并生产更复杂的形状（在传统加工中需要施加压力意味着只有简单的形状是可能的）。还有一种可能性，即改进的微观结构和性能可能是可互换的。目的和目标。该项目的目的是了解烧结中这些显着改进的机制，从而确定装甲制造的成本，弹道性能和制造多功能性方面的优势。该研究将涉及通过快速烧结、微观结构表征以及机械和弹道测试进行的陶瓷加工。ISI Web of Knowledge列出了6篇关于SiC快速烧结的论文，其中3篇由现任主管撰写。这说明了一个事实，即本质上的新奇是在闪速烧结非氧化物本身的过程中。所有关于它如何工作以及烧结陶瓷的微观结构和性能的信息都是新颖的。与EPSRC的战略和研究领域保持一致。该提案与EPSRC交付计划的“生产性国家”标题非常一致，该计划旨在通过“先进材料研究来推动新工艺，产品和可持续解决方案”，“引入下一代创新和颠覆性技术”。它也很好地符合研究领域“制造技术”和“材料工程-陶瓷”的制造未来的主题和“能源效率”的能源主题。公司和合作者。该项目是一个iCASE奖与Dstl作为工业赞助商。他们的主要贡献将是指导项目的方向，并就所生产材料的弹道测试进行直接合作。还将通过Dstl与Kennametal（纽波特）合作，Kennametal拥有SPS/热压设备，涉及现场辅助SiC加工，Dstl部分支付。还预计可能与对闪速烧结感兴趣的学者（例如，QMUL的M. J. Reece教授）合作。此凭证的NCE错误-结束日期为2022年1月31日。