Lunar regolith processing technologies for subsequent using


Аuthors

Kochnev K. V.1*, Nenarokomov A. V.2**

1. Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia
2. ,

*e-mail: kochnevkirillvl@gmail.com
**e-mail: nenarokomovav@mai.ru

Abstract

This work is a review of studies on the sintering of lunar regolith. The aim of the work was to collect information on proven methods of processing regolith for use as a building material of lunar bases. Among the possible methods for processing regolith into structural materials, the technique of layer-by-layer deposition using concentrated sunlight is highlighted. Due to the small amount of real lunar regolith brought to Earth, its simulators were used in the described experiments. A comparison of the characteristics of this regolith and simulators is given. The article considers the influence of various factors on sintered samples. Factors can be condition- nally divided into two groups: regolith properties and sintering parameters. The properties of regolith include chemical and particle size distribution. Among the sintering parameters, it is worth highlighting the scanning speed and pattern, the energy flux density in the scanning beam, the pressure exerted on the sintered sample and the environment in which sintering takes place. It should be noted that some parameters in the monitored works were not combined, since other goals were pursued. The best strength characteristics were obtained in samples sintered in a vacuum in a resistive furnace during preliminary pressing with an increase in the amount of fine fraction in the regolith. Pressing and introducing an additional fine fraction increase the number of contact points between the particles. Evacuation reduces the required sintering tem- perature and porosity. However, sintering under the press in this form does not allow to work out the scanning technology. In this regard, in the future it is necessary to develop a technique



in which particles will be compacted and sintered by scanning with a beam of concentrated

energy.

Keywords:

lunar regolith, sintering, additive technologies, solar concentrator, lunar base.

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