| 简介 |
FIELD : chemistry.
SUBSTANCE : boron suboxide-based composite material contains boron suboxide and a second phase which contains a rare-earth metal oxide in amount of up to 20 vol. %. The rare-earth metal oxide can be selected from a group comprising oxides of scandium, preferably yttrium and lanthanide elements, and can also be a mixture of rare-earth metal oxides. Besides rare-earth metal oxide(s), the second phase can also contain one oxide or a mixture of oxides of group IIA, IIIA and IVA elements, preferably aluminium oxide and optionally a boride selected from a group comprising borides of transition metals : iron, cobalt, nickel, titanium, tungsten, tantalum, hafnium, zirconium, rhenium, molybdenum and chromium. The composite material is obtained by sintering at pressure below 200 MPa and temperature lower than 1900°C.
EFFECT : high wear resistance of the composite material.
21 cl, 13 ex, 1 tbl, 2 dwg |
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