Authors:

Samuel Greenaway

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About Paper:

Most joining practices such as welding and brazing have defined methods and processing parameters for different materials. There have been numerous processing parameters on temperatures and holding times for a variety of materials developed, but there is little true understanding of the universal relationship that leads to joining for each category of materials. To tackle the problem, the research objective is to elucidate the interdiffusion and bonding mechanism with a focus of processing parameters of power, time, and temperature. The work includes a review of literature regarding joining dissimilar materials at interfaces through interdiffusion in addition to conducting heating experiments to reveal the relation of interdiffusion and processing parameters in terms of power, time and temperature. To do so, a custom-designed fast heating source was used to heat a thin piece of steel that has either a small polished steel foil square or ceramic piece pressed into it at a variety of temperatures and hold times to allow for the power output from the heating source to be recorded. Results suggest that increased power, time, and temperature lead to greater interdiffusion for both steel and ceramic, but too much of each parameter has negative effects such as undesired phase change and grain growth. This relationship will help with developing innovative methods of joining similar and dissimilar materials and will help more materials to be joined such as the ones needed in extreme environment applications of the aerospace and nuclear industry.

Source:

Purdue University / 2023

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Co-authors:

Samuel Greenaway