Tantalic oxide modified molybdenum disilicide based material and preparation method thereof

Abstract

The invention relates to a tantalum pentoxide modified molybdenum disilicide-based composite material and a corresponding preparation method, wherein, the preparation method comprises following steps: equably mixing tantalum pentoxide and molybdenum disilicide according to a weight proportion that the tantalum pentoxide is 1% to 7% and molybdenum disilicide is 93% to 99%; dispersing by ultrasonic wave and ball milling and mixing to obtain a dry powder, sintering the dry powder in a vacuum heat pressing sintering furnace at a temperature of 1400 DEG C to obtain the antalum pentoxide modified molybdenum disilicide-based composite material. The invention has the advantages that: the Ta2O5 doped MoSi2 composite material has high specific strength, high temperature resistant performance and corrosion resistance performance, strong anti-high temperature oxidation performance and anti-heat shock ability, and good conductivity for electricity and heat.

Description

1. Technical field

[0001] What the present invention relates to is a kind of composite material, specifically a kind of MoSi 2 base composite material. The present invention also relates to a MoSi 2 Method for preparing composite materials. 2. Background technology

[0002] Some structural components in modern aviation and aerospace systems require materials that can work safely and reliably at high temperatures, and have low structural weight, so as to increase the thrust-to-weight ratio as much as possible. New materials used at temperatures up to 1600°C must meet the requirements of high strength, creep resistance, good fracture toughness, oxidation resistance, and stable structural properties. Among the high-temperature structural materials currently being studied, engineering ceramics are difficult to put into high-temperature applications in the short term due to toughness and processing difficulties, poor thermal conductivity, and thermal stress during thermal cycl...

Examples

Embodiment

[0019] Embodiment: The hot-pressing sintering technology of the present invention is combined with ultrasonic wave and ball milling process, has obtained the Ta 2 o 5 doped MoSi 2 base composite material. 1%, 3%, 5%, 7% Ta by weight 2 o 5 and 93%-99% MoSi by weight 2 The powder was ultrasonically dispersed in a beaker filled with absolute ethanol for 30 minutes; the dispersed solution was put into a ball mill tank for ball milling for 4 hours, wherein the ball-to-material ratio was 20:1, and the speed was 450 rpm; the slurry after ball milling was The materials were freeze-dried, ground, and sieved, then put into graphite grinding tools, and sintered at 1400°C for 40 minutes to obtain Ta 2 o 5 / MoSi 2 Sintered body.

1. Technical field

[0001] What the present invention relates to is a kind of composite material, specifically a kind of MoSi 2 base composite material. The present invention also relates to a MoSi 2 Method for preparing composite materials. 2. Background technology

[0002] Some structural components in modern aviation and aerospace systems require materials that can work safely and reliably at high temperatures, and have low structural weight, so as to increase the thrust-to-weight ratio as much as possible. New materials used at temperatures up to 1600°C must meet the requirements of high strength, creep resistance, good fracture toughness, oxidation resistance, and stable structural properties. Among the high-temperature structural materials currently being studied, engineering ceramics are difficult to put into high-temperature applications in the short term due to toughness and processing difficulties, poor thermal conductivity, and thermal stress during thermal cycl...

Examples

Embodiment

[0019] Embodiment: The hot-pressing sintering technology of the present invention is combined with ultrasonic wave and ball milling process, has obtained the Ta 2 o 5 doped MoSi 2 base composite material. 1%, 3%, 5%, 7% Ta by weight 2 o 5 and 93%-99% MoSi by weight 2 The powder was ultrasonically dispersed in a beaker filled with absolute ethanol for 30 minutes; the dispersed solution was put into a ball mill tank for ball milling for 4 hours, wherein the ball-to-material ratio was 20:1, and the speed was 450 rpm; the slurry after ball milling was The materials were freeze-dried, ground, and sieved, then put into graphite grinding tools, and sintered at 1400°C for 40 minutes to obtain Ta 2 o 5 / MoSi 2 Sintered body.

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