About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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Advanced Materials for Harsh Environments
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Presentation Title |
Now On-Demand Only - Characterization and High Temperature Electrical Properties of Brazed Joints of La0.8Sr0.2CrO3 with Nickel and Nickel Alloys |
Author(s) |
Zhengtao Yang, Javier Antonio Mena, Jordan Conte, Brian Jordan, Katarzyna Sabolsky, Kostas Sierros, Edward Michael Sabolsky |
On-Site Speaker (Planned) |
Zhengtao Yang |
Abstract Scope |
There are many new electronics and sensor technologies being developed that are based on refractory conductive ceramics, which require stable joints that interconnect the active electroceramic components to exterior signal collection and processing hardware. In this work,the electrically conductive strontium-doped lanthanum chromite (La0.8Sr0.2CrO3) was brazed to nickel and nickel alloys in argon using nickel-based brazes including AWS BNi-3.The effect of bonding temperature/time, braze thickness, application pressure, surface roughness, and braze characteristics were evaluated. The joint chemistry and microstructure were characterized by SEM/EDS, and the local mechanical properties were tested with the use of nanoindentation.The electrical resistivity of the constituents were measured individually using a four-probe resistance from 200-1200 ℃ in argon and air.The joint resistivity was resolved by completing similar four-probe resistance measurements of the metal-ceramic joint and deconvoluting the contribution of each through composite models. This approach is expected to enable seamless, robust, interconnections for high temperature, harsh environments. |