Initially designed to construct a dome, the building material is composed of a lunar rock-like material mixed with powdered aluminum that can be molded into any shape.
The invention recently won the In-Situ Lunar Resource Utilization materials and construction category award from the Pacific International Space Center for Exploration Systems (PISCES). The award was one of two prizes given out this year by the research center, which is dedicated to supporting life on the moon and beyond.
Design work on the early-development lunar bricks was based on previous work by the College of Engineering student team’s adviser Kathryn Logan, a professor of materials science and engineering and the Virginia Tech Langley Professor at the National Institute of Aerospace in Hampton, Va. The seven-member student team works with Logan at the NIA.
Logan’s prior research entailed mixing powdered aluminum and ceramic materials to form armor plating for tanks funded through a Department of Defense contract. “I theorized that if I could do this kind of reaction to make armor, then I could use a similar type of reaction to make construction materials for the moon,” Logan said.
Since actual lunar rock, known as regolith, is scarce, the students used volcanic ash from a deposit on Earth along with various minerals and basaltic glass, similar to rock on the lunar surface, according to Eric Faierson, a doctoral student who led the Virginia Tech team.
During initial experiments, the simulated regolith and aluminum powder were mixed and placed inside a shallow aluminum foil crucible. A wire was inserted into the mixture, which was then heated to 2,700 degrees Fahrenheit triggering a reaction called self-propagating high-temperature synthesis (SHS), Logan said. The reaction caused the material to form a solid brick. A ceramic crucible was used in later experiments to form complex curved surfaces.
Once the student team had created a brick, they found that it was almost as strong as concrete under various pressure tests. Faierson said one-square inch of the brick could withstand the gradual application of 2,450 pounds, nearly the weight of a Ford Focus. This strength would enable it to withstand an environment where gravity is a fraction of the pull on Earth. The more than yearlong ongoing research has included studying the bricks reaction to solar radiation and their effectiveness as a construction material for lunar applications.
The research team chose small bricks -- about one-third the size of a regular mason’s brick, or roughly 5 inches x 2.5 inches x 1 inch, and weighing about an eighth of a pound -- for quality control and to conserve materials. “Theoretically the material can be made in any size and shape, however performing the reaction on a larger scale increases the potential for” flaws in the end product, Faierson said. “Large scale implementation might be more appropriate in applications such as landing pads, roadways, and blast berms, where flaws are less of a concern.”
The group formed several brick shapes to demonstrate the concept of forming an igloo-like dome component, but did not build the full structure. Creation of larger bricks, about cinder block size, including those closer to perfectly formed shape, are forthcoming, Logan said. Also to be studied is the harnessing of large quantities of heat derived from the SHS reaction to produce electricity, and extract volatiles for the lunar colony.
One of the team members, Michael Hunt, a graduate student, studied the chemical composition of the aluminum powder and the regolith before the fusion process, and then the resulting brick compound. “It’s definitely exciting to have worked on the lunar brick project,” he said. “I never would have thought that I’d be a part of something like this,” Hunt said.
Judging by members of the Japan-United States Science, Technology & Space Applications Program, which included scientists from NASA and industry, was based on the novelty and thoughtfulness evidenced by the teams, their commitment to PISCES goals and objectives, and their compliance with the rules of the competition. PISCES is located in Hawaii, where volcanic geology gives scientists a landscape similar to the moon that can be used to test technology prior to possible lunar use.
Winning College of Engineering student team members included Faierson, a doctoral student in the materials science and engineering (MSE) department; Hunt, a MSE master’s degree candidate from Virginia Beach, Va.; Susan Holt, a doctoral student in MSE from Christiansburg, Va.; Scott Hopkins, an undergraduate mechanical engineering student from Yorktown, Va.; Sharon Jefferies, a masters student in the aerospace and ocean engineering department from Newport News, Va.; Michael Okyen, an undergraduate mechanical engineering student from Yorktown, Va.; and Brian Stewart, an MSE doctoral student from Hayes, Va.
A student team from Massachusetts Institute of Technology won the second award, in the category of systems engineering.
The Virginia Tech team at Hampton is part of the National Institute of Aerospace, a nonprofit research and graduate education institute. Formed in 2002 to support NASA’s mission of space exploration, the Institute’s graduate program offers masters and doctorate degrees in the fields of engineering and science through Georgia Tech, Hampton University, North Carolina A&T State University, North Carolina State University, the University of Maryland, the University of Virginia and Virginia Tech.
The College of Engineering (www.eng.vt.edu) at Virginia Tech is internationally recognized for its excellence in 14 engineering disciplines and computer science. The college’s 5,700 undergraduates benefit from an innovative curriculum that provides a “hands-on, minds-on” approach to engineering education, complementing classroom instruction with two unique design-and-build facilities and a strong Cooperative Education Program. With more than 50 research centers and numerous laboratories, the college offers its 1,800 graduate students opportunities in advanced fields of study such as biomedical engineering, state-of-the-art microelectronics, and nanotechnology. Virginia Tech, the most comprehensive university in Virginia, is dedicated to quality, innovation, and results to the commonwealth, the nation and the world.
Steven Mackay | Newswise Science News
NASA's SDO sees partial eclipse in space
29.05.2017 | NASA/Goddard Space Flight Center
Strathclyde-led research develops world's highest gain high-power laser amplifier
29.05.2017 | University of Strathclyde
The world's highest gain high power laser amplifier - by many orders of magnitude - has been developed in research led at the University of Strathclyde.
The researchers demonstrated the feasibility of using plasma to amplify short laser pulses of picojoule-level energy up to 100 millijoules, which is a 'gain'...
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
29.05.2017 | Earth Sciences
29.05.2017 | Life Sciences
29.05.2017 | Physics and Astronomy