Research on preparation and characterization of Ti-Ti5Si3 gradient composite porous material via in-situ reactive process

Liu, Zhongjun; Gao, Boyang; Liu, Yuan; Ji, Shuai; Ao, Qingbo

doi:10.1016/j.jallcom.2021.163405

Cited by 6 publications

(8 citation statements)

References 55 publications

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“…3), except the sample of 0 wt.% Fe doping amount. This phenomenon was also observed in our previous work [30]. The porous membrane in this thickness scale can not provide enough resistance effects on the test gas, resulting in a large error in the pore size measurement by Bubble Pressure Method.…”

Section: (D)supporting

confidence: 74%

“…As far as it is concerned, the membrane thickness is in the range of 5∼7 µm. This value range is slightly larger than that reported in our previous work [30], and it has been shown that the thickness of membrane fabricated without Fe doping is 3∼6 µm. This confirmed again that Fe doping can be benefit to the formation and growth of membrane.…”

Section: (D)contrasting

confidence: 62%

“…Then Si reacting with Fe doped titanium matrix above Ti-O and FeO compounds to form Ti-Si compounds membrane. This has been proved in the previous work of that the O content gradually increased in the membrane thickness direction [30], and this is the reason of Ti-O compounds less distributed and is not observed at the top of the membrane.…”

Section: (D)mentioning

confidence: 55%

“…The preparation method of Fe doping Ti-Si porous membrane is the same as the previous work [30], which is a combination of powder metallurgy and in-situ reaction methods. The schematic of this combination and the preparation process is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…The previously described researches show the importance of intermetallic compound, but is not all intermetallic membranes for applications of filtration and separation. Our previous work [30][31][32] proposed a novel method of in-situ reactive process within a confined space to prepare Ti-based Ti5Si3 porous membrane using Ti and SiO2. It was found that the pores of membrane are open and throughout the membrane, which guarantees the filtration applications.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Fe doping on preparation of Ti-Si porous membrane via in-situ reactive process

Liu

Zhao

et al. 2023

Preprint

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Asymmetric porous filter element can reach a high filtering accuracy with larger filtration flux, which can enhance the filtration efficiency and reduce the energy consumption when it was applied in separation equipment. A novel porous material of Ti-Si intermetallic compound micro-porous membrane was successfully synthesized with Fe doped Ti mixed powder and SiO2 by the in-situ reactive sintering process. Effects of Fe doping, sintering temperature and the external load pressure on the formation of membrane were systemically studied. The results show that increasing Fe doping amount can celebrate the in-situ reactive process and promote the membrane formation. The synthesized granules on the membrane are well distributed with the size of 1∼3 µm, and the thickness of the membranes is 4∼7 µm. The relative air permeability coefficient of porous membrane reduces raptly with increasing either Fe doping amount, or sintering temperature and the external load pressure. All synthesized membranes show the presence of Ti5Si3 and Ti phases, with a little amount phase of FeTi and FeO. The membrane formation mechanism is due to the large reduction reactivity of Fe doped Ti powder with SiO2, and the asymmetric porous structure of Ti5Si3/Ti was obtained finally.

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Section: (D)supporting

confidence: 74%

Section: (D)contrasting

confidence: 62%

Section: (D)mentioning

confidence: 55%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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