High temperature sensor assembly

高温传感器组件

• 批准号: 536000-2018
• 负责人: Sinclair, Anthony
• 金额: $ 1.55万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=678549
• 关键词: temperature; sensor; assembly

Many industrial plants and electrical power generation facilities would benefit from having ultrasonic sensors installed at critical locations to monitor for hazardous conditions such as wall thinning from corrosion. Such sensors must endure temperatures of up to 700 degrees Centigrade. Transducer components capable of withstanding such temperatures are now available, but bonding the components together into a functional unit poses a problem: interfacial thermal stresses cause the bond lines to fail, because each transducer component expands at a different rate as its temperature is raised. In this project, we develop a bonding protocol to address this issue, targeted towards the specific materials and temperature range (20 - 700 C) that are pertinent to the needs of our industrial partner.The bonding agents that are candidates for this task are six industrial adhesive agents and braze materials. An optimal curing cycle, bondline thickness, and assembly sequence will be determined for each candidate. Transducer prototyppes made with each bonding agent will be assessed for physical strength and ultrasonic performance over the full temperature range of interest. Destructive examination of the bondline cross section will be carried out by Scanning electron Microscope to assess the failure mechanism of unsuccessful bonding operations to aid in developing a solution. The final solution to be delivered to the industrial partner will be the recommended bonding agent, the associated curing cycle, assembly details including any jigs to aid the operation, and detailed results of the testing program.

许多工业工厂和发电设施将受益于在关键位置安装超声波传感器，以监测危险条件，如腐蚀导致的壁厚变薄。这种传感器必须承受高达700摄氏度的温度。能够承受这样的温度的换能器组件现在是可用的，但是将组件结合在一起成为功能单元提出了一个问题：界面热应力导致结合线失效，因为每个换能器组件随着其温度升高以不同的速率膨胀。在这个项目中，我们针对特定材料和温度范围（20 - 700 C）开发了一个键合协议来解决这个问题，这与我们的工业合作伙伴的需求有关。最佳固化周期、胶层厚度和组装顺序将针对每个候选产品进行确定。将评估使用每种粘合剂制成的换能器原型在整个感兴趣温度范围内的物理强度和超声性能。将通过扫描电子显微镜对粘合层横截面进行破坏性检查，以评估不成功粘合操作的失效机制，以帮助制定解决方案。交付给工业合作伙伴的最终解决方案将是推荐的粘合剂、相关的固化周期、装配细节（包括任何辅助操作的夹具）以及测试程序的详细结果。