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Journal articles on the topic 'IRON HYDRIDES'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Serovaiskii, A. Yu, A. Yu Kolesnikov, and V. G. Kutcherov. "Formation of iron hydride and iron carbide from hydrocarbon systems at ultra high thermobaric conditions." Геохимия 64, no. 9 (September 20, 2019): 995–1002. http://dx.doi.org/10.31857/s0016-7525649995-1002.

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The chemical interaction of hydrocarbon systems and iron-bearing minerals was investigated under extreme thermobaric conditions, corresponding to the Earth upper mantle. As a result of the reaction, the formation of iron carbide and iron hydride was detected. The experiments were carried out in diamond anvils cells with laser heating. Natural petroleum from the Korchaginskoe deposit and a synthetic mixture of paraffin hydrocarbons were used as hydrocarbon systems, and pyroxene-like glass and ferropericlase (57Fe enriched) as iron bearing minerals. The experiments were carried out in the pressure range of 26–95 kbar and temperature range of 1000–1500°C (±100°C). As a result of the experiments, the formation of iron hydride was detected at pressure of 26–69 kbar (corresponds to a depth of 100–200 km), and a mixture of iron carbide and iron hydride at pressure of 75–95 kbar (corresponds to a depth of 210–290 km). The formation of hydrides and iron carbides as a results of the interaction of hydrocarbon systems with iron-bearing minerals may indicate the possible existence of these compounds in the upper mantle.

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2

Dufour, Jacques, Xavier Dufour, Fabienne Dioury, and Jenny D. Vinko. "Measurement of the enthalpy of formation of an iron pico-hydride and of its main properties." International Journal of Modern Physics B 31, no. 25 (October 10, 2017): 1745007. http://dx.doi.org/10.1142/s0217979217450072.

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Chemical reactions result from the outside shell electrons of the reacting species being shared in various types of combinations. Typical distances involved are tenths of nm, resulting in binding energies typically in the order of hundreds of kJ/mole (eV/atom). The synthesis of a novel “atomic system” formed from Iron and di-Hydrogen has been achieved. The measured enthalpy of formation is some 40 MJ/moleFe and the distance between the hydrogen proton and the iron nucleus is some 8 pm, hence the proposed name: Iron Pico-Hydride. This compound is a permanent electric dipole of atomic size. Pico-Hydrides could, thus, play a significant role in HT superconductivity and in super-capacitors. The synthesis is compatible with the standard model.

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3

Haim, Lorraine, François Robert, Laurent Peres, Pierre Lecante, Karine Philippot, Romuald Poteau, Marc Respaud, and Catherine Amiens. "Correlation between surface chemistry and magnetism in iron nanoparticles." Nanoscale Advances 3, no. 15 (2021): 4471–81. http://dx.doi.org/10.1039/d1na00258a.

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4

Morris, Robert H. "Iron Group Hydrides in Noyori Bifunctional Catalysis." Chemical Record 16, no. 6 (August 15, 2016): 2644–58. http://dx.doi.org/10.1002/tcr.201600080.

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5

Antonov, V. E., M. Baier, B. Dorner, V. K. Fedotov, G. Grosse, A. I. Kolesnikov, E. G. Ponyatovsky, G. Schneider, and F. E. Wagner. "High-pressure hydrides of iron and its alloys." Journal of Physics: Condensed Matter 14, no. 25 (June 13, 2002): 6427–45. http://dx.doi.org/10.1088/0953-8984/14/25/311.

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6

Liu, Jianguo, Ailing Zhang, Heng Song, Qingxiao Tong, Chen-Ho Tung, and Wenguang Wang. "Iron(II) hydrides bearing a tetradentate PSNP ligand." Chinese Chemical Letters 29, no. 6 (June 2018): 949–53. http://dx.doi.org/10.1016/j.cclet.2017.09.059.

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7

Gee, Leland B., Vladimir Pelmenschikov, Hongxin Wang, Nakul Mishra, Yu-Chiao Liu, Yoshitaka Yoda, Kenji Tamasaku, Ming-Hsi Chiang, and Stephen P. Cramer. "Vibrational characterization of a diiron bridging hydride complex – a model for hydrogen catalysis." Chemical Science 11, no. 21 (2020): 5487–93. http://dx.doi.org/10.1039/d0sc01290d.

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8

Kiernicki, John J., James P. Shanahan, Matthias Zeller, and Nathaniel K. Szymczak. "Tuning ligand field strength with pendent Lewis acids: access to high spin iron hydrides." Chemical Science 10, no. 21 (2019): 5539–45. http://dx.doi.org/10.1039/c9sc00561g.

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Pendent borane Lewis acids provide an avenue for changing a ligand's field strength through acid/base interactions; this strategy was highlighted within a series of biologically-relevant high spin iron hydrides.

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9

Chang, Guoliang, Peng Zhang, Wenjing Yang, Shangqing Xie, Hongjian Sun, Xiaoyan Li, Olaf Fuhr, and Dieter Fenske. "Correction: Pyridine N-oxide promoted hydrosilylation of carbonyl compounds catalyzed by [PSiP]-pincer iron hydrides." Dalton Transactions 49, no. 32 (2020): 11412. http://dx.doi.org/10.1039/d0dt90147d.

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Correction for ‘Pyridine N-oxide promoted hydrosilylation of carbonyl compounds catalyzed by [PSiP]-pincer iron hydrides’ by Guoliang Chang et al., Dalton Trans., 2020, 49, 9349–9354, DOI: 10.1039/D0DT00392A.

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10

Chang, Guoliang, Peng Zhang, Wenjing Yang, Shangqing Xie, Hongjian Sun, Xiaoyan Li, Olaf Fuhr, and Dieter Fenske. "Pyridine N-oxide promoted hydrosilylation of carbonyl compounds catalyzed by [PSiP]-pincer iron hydrides." Dalton Transactions 49, no. 27 (2020): 9349–54. http://dx.doi.org/10.1039/d0dt00392a.

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Five [PSiP]-pincer iron hydrides 1–5 were used as catalysts to study the effects of pyridine N-oxide and the electronic properties of [PSiP]-ligands on the catalytic hydrosilylation of carbonyl compounds.

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11

Field, Leslie D., Warren J. Shaw, and Peter Turner. "Addition of Nitrogen-Containing Heteroallenes to Iron(II)-Hydrides." Organometallics 20, no. 16 (August 2001): 3491–99. http://dx.doi.org/10.1021/om0100030.

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12

Albertin, Gabriele, Stefano Antoniutti, Elena Del Ministro, and Emilio Bordignon. "Reactivity of iron(II) non-classical hydrides with alkynes." Journal of the Chemical Society, Dalton Transactions, no. 22 (1992): 3203. http://dx.doi.org/10.1039/dt9920003203.

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13

Unsleber, Jan P., Johannes Neugebauer, and Robert H. Morris. "DFT methods applied to answer the question: how accurate is the ligand acidity constant method for estimating the pKa of transition metal hydride complexes MHXL4 when X is varied?" Dalton Transactions 47, no. 8 (2018): 2739–47. http://dx.doi.org/10.1039/c7dt03473c.

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Additive ligand acidity constants A_L of anionic ligands are calculated for neutral hydrides of iron(ii), ruthenium(ii) and osmium(ii) with phosphine and carbonyl co-ligands; constant A_L in green, more variable A_L in red.

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14

Zarifi, Niloofar, Tiange Bi, Hanyu Liu, and Eva Zurek. "Crystal Structures and Properties of Iron Hydrides at High Pressure." Journal of Physical Chemistry C 122, no. 42 (September 25, 2018): 24262–69. http://dx.doi.org/10.1021/acs.jpcc.8b06934.

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15

Antonov, V. E., M. Baier, B. Dorner, V. K. Fedotov, G. Grosse, A. I. Kolesnikov, E. G. Ponyatovsky, G. Schneider, and F. E. Wagner. "ChemInform Abstract: High-Pressure Hydrides of Iron and Its Alloys." ChemInform 33, no. 23 (May 21, 2010): no. http://dx.doi.org/10.1002/chin.200223247.

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16

Huang, B., K. Yvon, and P. Fischer. "New iron(II) complex metal hydrides with SrMg2FeH8 type structure." Journal of Alloys and Compounds 227, no. 2 (September 1995): 121–24. http://dx.doi.org/10.1016/0925-8388(95)01648-1.

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17

Ryan, D. H., X. Chen, and Z. Altounian. "Mössbauer studies of rare earth-iron hydrides, carbides, and nitrides." Journal of Materials Engineering and Performance 2, no. 2 (April 1993): 225–33. http://dx.doi.org/10.1007/bf02660290.

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18

Sanders, J. H., and B. J. Tatarchuk. "Activation and deactivation mechanisms for thin-film iron-titanium hydrides." Journal of the Less Common Metals 147, no. 2 (March 1989): 277–92. http://dx.doi.org/10.1016/0022-5088(89)90201-4.

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19

Schneider, G., M. Baier, R. Wordel, F. E. Wagner, V. E. Antonov, E. G. Ponyatovsky, Yu Kopilovskii, and E. Makarov. "Mössbauer study of hydrides and deuterides of iron and cobalt." Journal of the Less Common Metals 172-174 (August 1991): 333–42. http://dx.doi.org/10.1016/0022-5088(91)90464-f.

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20

Weber, Katharina, Thomas Weyhermüller, Eckhard Bill, Özlen F. Erdem, and Wolfgang Lubitz. "Design and Characterization of Phosphine Iron Hydrides: Toward Hydrogen-Producing Catalysts." Inorganic Chemistry 54, no. 14 (July 2015): 6928–37. http://dx.doi.org/10.1021/acs.inorgchem.5b00911.

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21

Schiwon, Rafael, Beatrice Braun, Ramona Metzinger, and Christian Limberg. "Creating Iron- and Rhenium-Bismuth Bonds by Reactions with Organometallic Hydrides." Zeitschrift für anorganische und allgemeine Chemie 642, no. 21 (October 2016): 1198–206. http://dx.doi.org/10.1002/zaac.201600322.

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22

Hong, Dae Ho, and Leslie J. Murray. "Carbon Dioxide Insertion into Bridging Iron Hydrides: Kinetic and Mechanistic Studies." European Journal of Inorganic Chemistry 2019, no. 15 (February 15, 2019): 2146–53. http://dx.doi.org/10.1002/ejic.201801404.

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23

Barton, Bryan E., C. Matthew Whaley, Thomas B. Rauchfuss, and Danielle L. Gray. "Nickel−Iron Dithiolato Hydrides Relevant to the [NiFe]-Hydrogenase Active Site." Journal of the American Chemical Society 131, no. 20 (May 27, 2009): 6942–43. http://dx.doi.org/10.1021/ja902570u.

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24

Shorikov, Alexey O., Sergey L. Skornyakov, Vladimir I. Anisimov, Sergey V. Streltsov, and Alexander I. Poteryaev. "Influence of Molecular Orbitals on Magnetic Properties of FeO2Hx." Molecules 25, no. 9 (May 8, 2020): 2211. http://dx.doi.org/10.3390/molecules25092211.

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Recent discoveries of various novel iron oxides and hydrides, which become stable at very high pressure and temperature, are extremely important for geoscience. In this paper, we report the results of an investigation on the electronic structure and magnetic properties of the hydride FeO 2 H x , using density functional theory plus dynamical mean-field theory (DFT+DMFT) calculations. An increase in the hydrogen concentration resulted in the destruction of dimeric oxygen pairs and, hence, a specific band structure of FeO 2 with strongly hybridized Fe- t 2 g -O- p z anti-bonding molecular orbitals, which led to a metallic state with the Fe ions at nearly 3+. Increasing the H concentration resulted in effective mass enhancement growth which indicated an increase in the magnetic moment localization. The calculated static momentum-resolved spin susceptibility demonstrated that an incommensurate antiferromagnetic (AFM) order was expected for FeO 2 , whereas strong ferromagnetic (FM) fluctuations were observed for FeO 2 H.

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25

Zheng,, Tingting, Yangyang Wang,, Zaixiao Yang,, Hongjian Sun,, and Xiaoyan Li,. "Catalytic Effect of Iron Hydrides on Dehydration of Primary Amides to Nitriles." Chinese Journal of Organic Chemistry 39, no. 10 (2019): 2941. http://dx.doi.org/10.6023/cjoc201903075.

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26

Antonov, V. E., K. Cornell, V. K. Fedotov, A. I. Kolesnikov, E. G. Ponyatovsky, V. I. Shiryaev, and H. Wipf. "Neutron diffraction investigation of the dhcp and hcp iron hydrides and deuterides." Journal of Alloys and Compounds 264, no. 1-2 (January 1998): 214–22. http://dx.doi.org/10.1016/s0925-8388(97)00298-3.

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27

Walter, Marc D., Jörg Grunenberg, and Peter S. White. "Reactivity studies on [Cp′FeI]2: From iron hydrides to P4-activation." Chemical Science 2, no. 11 (2011): 2120. http://dx.doi.org/10.1039/c1sc00413a.

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28

HUANG, B., K. YVON, and P. FISCHER. "ChemInform Abstract: New Iron(II) Complex Metal Hydrides with SrMg2FeH8 Type Structure." ChemInform 26, no. 52 (August 13, 2010): no. http://dx.doi.org/10.1002/chin.199552005.

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29

Ohta, Kenji, Sho Suehiro, Kei Hirose, and Yasuo Ohishi. "Electrical resistivity of fcc phase iron hydrides at high pressures and temperatures." Comptes Rendus Geoscience 351, no. 2-3 (February 2019): 147–53. http://dx.doi.org/10.1016/j.crte.2018.05.004.

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30

Bazhenova, T. A., L. M. Kachapina, A. E. Shilov, M. Yu Antipin, and Yu T. Struchkov. "Mono- and binuclear σ-aryl iron-lithium hydrides; synthesis and molecular structure." Journal of Organometallic Chemistry 428, no. 1-2 (April 1992): 107–23. http://dx.doi.org/10.1016/0022-328x(92)83223-5.

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31

Matysina, Z. A., S. Yu Zaginaichenko, D. V. Shchur, and M. T. Gabdullin. "Sorption Properties of Iron–Magnesium and Nickel–Magnesium Mg2FeH6 and Mg2NiH4 Hydrides." Russian Physics Journal 59, no. 2 (June 2016): 177–89. http://dx.doi.org/10.1007/s11182-016-0757-0.

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32

Morris, Robert H. "Mechanisms of the H2- and transfer hydrogenation of polar bonds catalyzed by iron group hydrides." Dalton Transactions 47, no. 32 (2018): 10809–26. http://dx.doi.org/10.1039/c8dt01804a.

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33

Kutcherov, V. G., K. S. Ivanov, and A. Yu Serovaiskii. "Deep hydrocarbon cycle." LITHOSPHERE (Russia) 21, no. 3 (July 8, 2021): 289–305. http://dx.doi.org/10.24930/1681-9004-2021-21-3-289-305.

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Research subject. Experimental modelling of the transformation of complex hydrocarbon systems under extreme thermobaric conditions was carried out. The results obtained were compared with geological observations in the Urals, Kamchatka and other regions.Material and methods. The materials for the research were a model hydrocarbon system similar in composition to natural gas condensate and a system consisting of a mixture of saturated hydrocarbons and various iron-containing minerals enriched in 57Fe. Two types of high-pressure equipment were used: a diamond anvils cell and a Toroid-type high-pressure chamber. The experiments were carried out at pressures up to 8.8 GPa in the temperature range 593–1600 K.Results. According to the obtained results, hydrocarbon systems submerged in a subduction slab can maintain their stability down to a depth of 50 km. Upon further immersion, during contact of the hydrocarbon fluid with the surrounding iron-bearing minerals, iron hydrides and carbides are formed. When iron carbides react with water under the thermobaric conditions of the asthenosphere, a water-hydrocarbon fluid is formed. Geological observations, such as methane finds in olivines from ultramafic rocks unaffected by serpentinization, the presence of polycyclic aromatic and heavy saturated hydrocarbons in ophiolite allochthons and ultramafic rocks squeezed out from the paleo-subduction zone of the Urals, are in good agreement with the experimental data.Conclusion. The obtained experimental results and presented geological observations made it possible to propose a concept of deep hydrocarbon cycle. Upon the contact of hydrocarbon systems immersed in a subduction slab with iron-bearing minerals, iron hydrides and carbides are formed. Iron carbides carried in the asthenosphere by convective flows can react with hydrogen contained in the hydroxyl group of some minerals or with water present in the asthenosphere and form a water-hydrocarbon fluid. The mantle fluid can migrate along deep faults into the Earth’s crust and form multilayer oil and gas deposits in rocks of any lithological composition, genesis and age. In addition to iron carbide coming from the subduction slab, the asthenosphere contains other carbon donors. These donors can serve as a source of deep hydrocarbons, also participating in the deep hydrocarbon cycle, being an additional recharge of the total upward flow of a water-hydrocarbon fluid. The described deep hydrocarbon cycle appears to be part of a more general deep carbon cycle.

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34

Vites, J. C., G. Jacobsen, T. K. Dutta, and T. P. Fehlner. "Protons on a cluster surface. Reversible generation of agostic (carbon-hydrogen-metal) hydrogens from iron hydrides (iron-hydrogen-iron) on a saturated triiron cluster." Journal of the American Chemical Society 107, no. 19 (September 1985): 5563–65. http://dx.doi.org/10.1021/ja00305a060.

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35

Karpov, V., and O. Nosko. "The effect of hydrogen on the properties of polymorphic metals during thermal cycling near the polymorphism temperature." Theory and practice of metallurgy, no. 6 (November 20, 2018): 62–70. http://dx.doi.org/10.34185/tpm.6.2018.08.

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The effect of hydrogen on the numerous properties of metals is known. In general, it is associated with the structure of its atom, which consists of a proton and an electron. Getting into the metal, it turns into an elementary particle, which has its own special properties. The paper considers the case of the interaction of hydrogen with polymorphic metals during their thermal cycling around the temperature of polymorphism. The main metal of this study is iron. It was revealed that during thermocyclic treatment in a hydrogen medium in iron during cooling, the yield strength decreases catastrophically by 3–4 orders of magnitude (up to a certain time, it was considered one order). In the absence of hydrogen (thermal cycling in an inert atmosphere), such changes did not occur. It was determined that when the crystal lattice restructuring from the γ phase to the α phase, the solubility of hydrogen decreases and it accumulates at the transformation boundary. Depending on the process parameters (cooling rate, saturation pressure, overheating temperature, symmetry relatively to the transformation point, etc.), various types of involuntary metal flow can be obtained. Besides the iron, other polymorphic metals - manganese, cobalt, titanium, zirconium - have been investigated. The deformation effect was observed only for manganese. Cobalt, due to another mechanism of polymorphic transformation, can not be deformed. Hydride-forming metals under normal conditions of cycling are severely cracked (the formation of hydrides), their small deformation is possible under very low hydrogen pressure. The reason for the formation of such properties is the creation of a special zone on the boundary of two phases – the H-layer. The concentration of hydrogen in the H-layer can reach tens of atomic percentages. This is confirmed by numerous experiments on fixing a new phase (N-martensite) and change the physical and mechanical properties of iron. In the deformation process, protons actively interact with defects in the lattice, which causes the pores formation inside the metal. These studies were awarded a diploma for the opening No. 313 authors V.Yu. Karpov and V.I Shapovalov.

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36

Song, Li-Cheng, Xi-Yue Yang, Xiu-Yun Gao, and Meng Cao. "Nickel–Iron Dithiolato Hydrides Derived from H2 Activation by Their μ-Hydroxo Ligand-Containing Analogues." Inorganic Chemistry 58, no. 1 (December 18, 2018): 39–42. http://dx.doi.org/10.1021/acs.inorgchem.8b02648.

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37

Murphy, Luke J., Michael J. Ferguson, Robert McDonald, Michael D. Lumsden, and Laura Turculet. "Synthesis of Bis(phosphino)silyl Pincer-Supported Iron Hydrides for the Catalytic Hydrogenation of Alkenes." Organometallics 37, no. 24 (November 20, 2018): 4814–26. http://dx.doi.org/10.1021/acs.organomet.8b00807.

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38

Galkin, Vitalii, Kamran Haider, Jong Bin Ahn, and Dong Soo Kim. "Effect of High Energy Ball Milling Washing Process on Properties of Nd₂Fe₁₄B Particles Obtained by Reduction-Diffusion." Key Engineering Materials 822 (September 2019): 244–51. http://dx.doi.org/10.4028/www.scientific.net/kem.822.244.

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Nd2Fe14B particles were obtained from mixture of neodymium oxide, iron oxide, boric acid and CaH2 by reduction-diffusion process. Two different washing processes were used for the separation of magnetic particles from Ca and CaO matrix: usual washing with water and planetary ball milling process in ethanol media. Nd2Fe14BHx hydrogenated state was formed after usual washing with water. Ethanol planetary ball milling washing procedure prevented the formation of Nd2Fe14B hydrides during washing. Variation of milling parameters allowed producing particles with different morphology such as spherical or flakes after planetary ball milling washing process. Influence of milling parameters on magnetic properties of Nd2Fe14B powder was investigated.

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39

Yun, J. C., S. S. Jung, Jung Goo Lee, C. J. Choi, and Jai Sung Lee. "A Study on the Optimization of Reduction-Diffusion Process for Synthesis of Sm₂Fe₁₇N_x Nanopowder." Materials Science Forum 638-642 (January 2010): 1796–801. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.1796.

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The present investigation attempted to optimize the R-D (reduction-diffusion) process for fabricating Sm2Fe17 nanoscale powder from ball-milled powders of samarium oxide and iron oxide using a solid reducing agent of calcium hydrides (CaH2). It was found that the target alloy phase of Sm2Fe17 can be produced by controlling the gas atmosphere in the process of powder preparation to R-D reaction. Powder handling of CaH2 in a protective atmosphere is essential to avoid the formation of Ca(OH)2 which suppresses calcium formation. A switching gas atmosphere of H2 to Ar-H2 during the R-D process at 350oC resulted in a reduction of Fe2O3 and alloying of Sm-Fe, consequently forming nanocrystalline Sm2Fe17.

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40

Ezzaher, Salah, Jean-François Capon, Frédéric Gloaguen, François Y. Pétillon, Philippe Schollhammer, Jean Talarmin, Roger Pichon, and Nelly Kervarec. "Evidence for the Formation of Terminal Hydrides by Protonation of an Asymmetric Iron Hydrogenase Active Site Mimic." Inorganic Chemistry 46, no. 9 (April 2007): 3426–28. http://dx.doi.org/10.1021/ic0703124.

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41

Tereshina, I. S. "Magnetoelastic effects in single-, poly-, and nanocrystalline iron- and cobalt-based rare-earth alloys and their hydrides." Russian Metallurgy (Metally) 2011, no. 7 (July 2011): 675–79. http://dx.doi.org/10.1134/s0036029511070159.

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42

Miller, Amy E. Stevens, and J. L. Beauchamp. "Gas-phase acidities of pentacarbonyl manganese, iron, and cobalt hydrides, (CO)5MnH, (CO)4FeH2, and (CO)4CoH." Journal of the American Chemical Society 113, no. 23 (November 1991): 8765–70. http://dx.doi.org/10.1021/ja00023a024.

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43

Sagatova, D. N., P. N. Gavryushkin, N. E. Sagatov, I. V. Medrish, and K. D. Litasov. "Phase Diagrams of Iron Hydrides at Pressures of 100–400 GPa and Temperatures of 0–5000 K." JETP Letters 111, no. 3 (February 2020): 145–50. http://dx.doi.org/10.1134/s0021364020030108.

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44

Wang, Lin, Hongjian Sun, Zhenyu Zuo, Benjing Xue, Xiaoyan Li, Olaf Fuhr, and Dieter Fenske. "Reactions of iron(II) hydrides formed by selective C F/C H bond activation in fluoroaryl-imines." Inorganica Chimica Acta 461 (May 2017): 64–70. http://dx.doi.org/10.1016/j.ica.2017.02.009.

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45

Dong, Yanhong, Yaomin Shi, Yizheng Geng, Tingting Zheng, Xiaoyan Li, Hongjian Sun, Olaf Fuhr, and Dieter Fenske. "Synthesis and characterization of bissilyl cobalt and iron hydrides bearing disilazane ligands via Si-H bond activation." Inorganica Chimica Acta 471 (February 2018): 99–103. http://dx.doi.org/10.1016/j.ica.2017.10.043.

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46

Wiesinger, G. "On the breakdown of the iron sublattice long-range magnetic order in RFeAl hydrides (R ≡ rare earth)." Journal of the Less Common Metals 130 (March 1987): 181–86. http://dx.doi.org/10.1016/0022-5088(87)90101-9.

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47

Nakajima, Hideo. "Fabrication of Porous Metals with Directional Pores through Unidirectional Solidification of Gas-Dissolved Melt." Materials Science Forum 654-656 (June 2010): 1452–55. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.1452.

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Lotus-type porous metals with long cylindrical pores aligned in one direction are fabricated by unidirectional solidification through thermal decomposition method (TDM). The pores are evolved from insoluble gas when the molten metal dissolving the gas is solidified. In the conventional pressurized gas method, hydrogen pressurized in a high-pressure chamber is used to dissolve hydrogen in the melt. However, the use of high-pressure hydrogen is not desirable because of its inflammability and explosive nature. This is particularly true when scaling up to mass production of lotus/Gasar metals. In order to overcome this shortcoming, the thermal decomposition method was developed. Gas-forming compounds such as hydrides were added into the molten metal to fabricate lotus/Gasar metals. The porosity and pore size were controlled by the amount of gas-forming compounds, solidification rate, atmospheric pressure, etc. TDM method is applied to fabricate lotus copper, aluminium and iron.

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48

Bortoluzzi, Marco, Emilio Bordignon, Gino Paolucci, and Bruno Pitteri. "A computational study on mixed-ligand N2P3 donor-set iron(II) and ruthenium(II) classical and non-classical hydrides." Polyhedron 26, no. 17 (October 2007): 4936–40. http://dx.doi.org/10.1016/j.poly.2007.07.003.

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Kanematsu, K., N. Ohkubo, K. Itoh, and S. Ban. "Effect of hydrogen for the magnetic properties of iron and cobalt in PuNi3 type hydrides Y(Fe1−xCox)2.9Hy." Journal of Applied Physics 81, no. 8 (April 15, 1997): 4095–97. http://dx.doi.org/10.1063/1.365092.

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Hamon, Jean-René, Paul Hamon, Loïc Toupet, Karine Costuas, and Jean-Yves Saillard. "Classical and non-classical iron hydrides: synthesis, NMR characterisation, theoretical investigation and X-ray crystal structure of the iron(IV) dihydride 〚Cp*Fe(dppe)(H)2〛+BF4–." Comptes Rendus Chimie 5, no. 2 (February 2002): 89–98. http://dx.doi.org/10.1016/s1631-0748(02)01327-9.

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