Method for enhancing lani4.8al0.2 alloy's resistance to CO, CO2, air poisoning and pulverization

Abstract

The invention discloses a method for enhancing the performance of LaNi4.8Al0.2 alloy to resist CO, CO2 and air poison and the anti-pulverization performance of the alloy, which comprises the steps of S1: preparing LaNi4.8Al0.2 alloy powder; S2: sieving the LaNi4.8Al0.2 alloy powder; S3: mixing ethyl alcohol with deionized water to obtain a mixed solution; S4: adding concentrated hydrochloric acid to adjust the pH value and obtain a first mixture; S5: mixing tetraethoxysilane with ethyl alcohol to obtain a second mixture; S6: mixing the first mixture with the second mixture to obtain a third mixture; S7: standing, and heating the third mixture to volatilize the ethyl alcohol; S8: adding hydrophilic gaseous phase silicon dioxide to the third mixture so as to obtain a silicon dioxide sol; S9: adding the LaNi4.8Al0.2 alloy powder to the silicon dioxide sol so as to obtain paste; S10: heating and drying the paste. According to the method disclosed by the invention, the problem that the LaNi4.8Al0.2 alloy is poor in anti-pulverization performance and poor in anti-poison capability is solved, the use stability of the LaNi4.8Al0.2 alloy is enhanced, and the service life of the LaNi4.8Al0.2 alloy is prolonged.

Description

technical field [0001] The present invention relates to a kind of LaNi 4.8 Al 0.2 The modification method of alloy surface, what specifically relate to is a kind of reinforced LaNi 4.8 Al 0.2 Alloy anti-CO, CO 2 , Air poisoning and anti-powdering performance. Background technique [0002] La-Ni-Al series hydrogen storage alloys have the advantages of easy activation, fast hydrogen absorption and desorption, stable cycle performance, and strong helium fixation ability, and are widely used in hydrogen isotope storage. When using La-Ni-Al series alloys to store tritium, because it can make the He produced by the decay of tritium 3 Retained in the crystal lattice, it will not be released with the dissociation of tritium, and pure tritium can be released, so La-Ni-Al series alloys are often used as the main material for tritium storage. [0003] However, in practical applications, there are also some problems to be solved in La-Ni-Al series alloys. For example, when hydrog...

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Problems solved by technology

[0008] The object of the present invention is to provide a kind of reinforced LaNi 4.8 Al 0.2 Alloy anti-CO, CO 2 , air poisoning and anti-powdering performance methods, mainly to solve the existing LaNi 4.8 Al 0.2 The alloy has anti-CO, CO 2 , air poisoning and poor anti-powdering ability

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