Assertion: borax's boron | /r/ObjectUse | used in cementation of iron
Facets:
Source sentences:
text: Boron is used in special-purpose alloys, in cementation of iron, as oxygen scavenger for copper and other metals, as fibres and filaments in composites with metals or ceramics, as semiconductor, for nuclear reactors, as a shield for nuclear radiation and in instruments used for detecting neutrons.