The phrase "alien materials" is correct and usable in written English.
It can be used in contexts discussing substances or items that are foreign or not native to a particular environment or situation.
Example: "The scientists discovered alien materials in the samples collected from the asteroid."
Alternatives: "foreign substances" or "extraterrestrial materials".
Giovannoni opposed the introduction of alien materials and forms into historic settings, but also discouraged literal replication of historic features.
An energy dispersive spectroscopy (EDS) device, which the SEM was equipped with, was used to identify the alloy compositions and alien materials found on the needle surfaces.
Further, in order to check the firmness of the lumps or other alien materials attached to the needle surfaces, several other randomly selected needles from each brand were cleaned in an ultrasonic washing machine for 1 min.
The alien student and the alien material are so accidentally, and must fall within our human capacity for creating as well as conserving familiarity.
Where can this new and alien material be stored within the old framework, where there was never any category for it?
But when the master's brother visits from England, Wash meets a white man who seems created from some wholly alien material.
En masse, concrete can be a peculiarly alien material in Britain where the light is delicate and pale; the material's plain, even surface disposes of the posssibility of conveying a scale that can be measured in human terms.
Dendritic cells normally latch on to bacteria and viruses before migrating to the lymph nodes, where they present the alien material to the immune system's "killer" T-cells that seek and destroy such invaders.
He was also among the first medical scientists to recognize the importance of giving patients drugs to suppress their immune systems, avoiding a life-threatening complication in which the transplanted marrow attacks a patient's own tissues as alien material.
There was such "Illegal Alien" material as little Roswell, N.M., space visitors and Little Green Men rings that glow in the dark ("7-Eleven, National City"); and "Cereal Neoindigenista," which pictured an Aztec god pouring out flakes made of spelt, millet, kamjut and quinoa.
So, besides the direct influence on crack propagation as inclusions of alien material, these inclusions affect the structure and phase composition of matrix zirconia, the distribution of residual stresses, and other physical and chemical properties.
