Abstract
A novel porous honeycomb-type substrate has been developed using solid-state sintering stainless steel fibers. The porous sintered stainless steel fiber honeycombs (PSSSFH) are composed of a skeleton of sintered stainless steel fibers, three-dimensionally interconnected porous structures and multiple parallel microchannels. The bending behavior of the PSSSFH is investigated using three-point bending tests. Four stages, including an elastic stage, a yielding stage with a plateau, a hardening stage and a failure stage, are observed during the bending process of the PSSSFH. In the initial yielding stage, the bending forces increase slowly with displacement increasing, and then a yielding plateau follows, which is unique compared with other porous materials. Moreover, the structure parameters of the PSSSFH are varied to investigate the influence on the bending strength. It is determined that the multiple parallel microchannels can enhance the bending strength of porous stainless steel fiber sintered substrates (PSSFSS) and do not influence the variation trend of bending strength of PSSFSS with porosity increasing. The open ratio is conducive to increasing the bending strength, and the microchannel diameters ranging from 0.5 mm to 1.5 mm have little influence on the bending strength. In addition, both the increasing of sintering temperature and sintering time can strengthen the PSSSFH.
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Acknowledgments
This work was financially sponsored by the National Natural Science Foundation of China (No. 51375176), Guangdong Provincial Natural Science Foundation of China (No. 2014A030313264) and the fundamental research funds for the central universities, SCUT (No. 2013ZZ017).
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Zou, S., Wan, Z., Lu, L. et al. Bending Behavior of Porous Sintered Stainless Steel Fiber Honeycombs. J. of Materi Eng and Perform 26, 744–751 (2017). https://doi.org/10.1007/s11665-016-2452-2
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DOI: https://doi.org/10.1007/s11665-016-2452-2