Effects of oxidizer structure on thermal and combustion behavior of Fe2O3/Zr thermite
Performance of MOF-derived micrometer porous Fe _2 O _3 as the oxidizer in Zr-fuelled thermite is compared with commercial nano-sized Fe _2 O _3 by characterizing thermal and combustion behavior of Fe _2 O _3 /Zr mixture via differential scanning calorimetry, optical emission measurement as well as...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2021-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ac3040 |
| Summary: | Performance of MOF-derived micrometer porous Fe _2 O _3 as the oxidizer in Zr-fuelled thermite is compared with commercial nano-sized Fe _2 O _3 by characterizing thermal and combustion behavior of Fe _2 O _3 /Zr mixture via differential scanning calorimetry, optical emission measurement as well as composition and morphology analysis on condensed combustion products. Results show that thermal behaviors of Fe _2 O _3 /Zr with a slow heating rate have little difference regardless of the kind of Fe _2 O _3 . However, MOF-derived micrometer porous Fe _2 O _3 show an obvious superiority in enhancing combustion of Fe _2 O _3 /Zr heated by a high rate. Combustion reactions of Fe _2 O _3 /Zr under high heating rates are probably rate-controlled by condensed reaction. The better performance of MOF-derived Fe _2 O _3 is attributed to its larger contact area with Zr particle in that micrometer porous Fe _2 O _3 particles are easily broken into primitive nano-sized particles, which effectively avoid the agglomeration of oxidizer. The MOF-derived Fe _2 O _3 particles obtained at calcination temperature of 550 °C enable the best combustion performance of Fe _2 O _3 /Zr thermite. This should be because the crystallinity and porous structure of 550 °C-Fe _2 O _3 are more favorable for the mass transfer process during high-rate combustion. |
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| ISSN: | 2053-1591 |