For example, boron fibers, as well as fibers of refractory compounds (for example, carbides, nitrides, borides
and oxides) with high strength and modulus of elasticity are used to harden aluminum, magnesium and their alloys in this case.
Thus, various types of inclusions such as oxides, nitrides, carbides, fluorides, borides
, chlorides and salts may be present in molten aluminum alloys.
No other phases, like Al borides
or nitrides, formed in the Al-BNNTs macro composites of the two series.
The studied material in this research work is VT3-1 titanium alloy containing the necessary alloy elements to form borides
during boriding the surface layer of samples.
Rare earth and alkaline earth metal borides
belong to the group of nonoxide type metal-like compounds and have high melting point, high chemical stability, stable specific resistance, low expansion coefficient at certain temperature ranges, diverse magnetic orders, and high neutron absorbability [1,2].
Even fluoropolymers are no threat to these barrels, which have a protective layer of nickel-rich boron alloy containing molybdenum and a matrix of borides
The overlay welded layers wear less when the structure was formed of martensite or layers consisting of carbides, borides
Characterization of novel borides
in Ti-Nb-Zr-Ta+ 2B metal-matrix composites.
In the production of composites, metals, ceramics and plastics are used as matrices, and metallic filaments, mono-crystalline 'moustaches', multi-component fibres and dispersible particles of carbides, borides
, oxides, diamonds and other materials are used as fillers.
The main areas of the initiation of fatigue microcracks in the alloys are the particles of carbides and borides
9), (10) During spraying, hard ceramic phases (such as carbides, borides
, and nitrides) are formed in situ by the reactions between the injected powder and the reactive gas.
Finally, Table 1 gives the data obtained by different authors who studied the borides