Search academic texts

Information × Registration Number 0221U105330, 0116U005332 , R & D reports Title The creation of new high-tech materials based on boron carbide and the development of technological principles receipt of these products with high service characteristics popup.stage_title Head Volkogon Volodymyr M., Доктор технічних наук Registration Date 29-06-2021 Organization Institute of Problems of Materials Science named after IM Frantsevich of the National Academy of Sciences of Ukraine popup.description2  A comprehensive study of the physical and mechanical characteristics of boron carbide powders to determine the technical requirements for them by the criterion of suitability in obtaining wear-resistant hot-pressed ceramics. It was found that the introduction of boron carbide powders in the composition of the nanodispersed component with B4C in an amount of up to ten mass percent provides a ceramic that has bend. about 450 MPa and K1C - 4.4 MPa · m1 / 2. Optimal physical and mechanical characteristics have a ceramic material based on boron carbide, which is obtained from a charge containing 15 wt.% Chromium oxide, 2 wt.% Titanium oxide and 5 wt.% Amorphous carbon. The bending strength of the material is 820 MPa, and the coefficient of crack resistance is 6.8 MPa · m1 / 2. The use in the process of obtaining hot-pressed ceramics activating additive of titanium dioxide 5 wt.% Helps to increase the wear resistance of the composite material. The conducted production tests of experimental hot-pressed beats from the developed ceramics on the MC-1,25 mill for sand grinding established that their service life exceeds the service life of mass-produced beats by 10-12 times. Product Description popup.authors Avramchuk Ivan I Avramchuk Svetlana K Zablodsky Volodymyr Kotlyar Dmytro A Kravchyk Andriy V. Pavlychuk Tatiana V. Skrynʹka Andriy O popup.nrat_date 2021-06-29 Close