| 摘要 |
FIELD: metallurgy.SUBSTANCE: invention relates to production of gradient ceramic materials based on powders of metal oxides. Method comprises obtaining polydispersed ceramic powder metal oxide or mixture of powders of metal oxides by spraying aqueous solutions of metal salts or mixtures of metal salts into high-frequency discharge plasma through slot nozzle of variable cross-section from 0.1 to 100 mcm, then adding organic binder to said powder, mixing moulding mixture, poured into a mould, holding moulding mixture for demixing thereof into fractions and sintering obtained workpiece with isothermal holding. Polydispersed ceramic powder may be powder of following oxides: AlO, ZrO, CaO, YO, MgO. Moulding mixture can have following ratio of components: powder of metal oxide or mixture of powders of metal oxides 80-85 wt%, organic binder - balance. Organic binder used can be paraffin, or wax, or a mixture of paraffin and wax in ratio of 9:1.EFFECT: obtaining ceramic gradient material with a structure ensuring uniform change of mechanical properties along section of article and having high resistance to thermal effects - not less than 200 cycles at temperature 1,600 °C.8 cl, 4 ex |
