CN103787685A - Method for fabricating silicon carbide whisker-toughened silicon carbide product - Google Patents
Method for fabricating silicon carbide whisker-toughened silicon carbide product Download PDFInfo
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- CN103787685A CN103787685A CN201310480116.5A CN201310480116A CN103787685A CN 103787685 A CN103787685 A CN 103787685A CN 201310480116 A CN201310480116 A CN 201310480116A CN 103787685 A CN103787685 A CN 103787685A
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Abstract
The invention discloses a method for fabricating a silicon carbide whisker-toughened silicon carbide product. The method comprises the following steps: (1) mixing the selected silicon carbide powder and silicon carbide whiskers with a binder in a mixing mill at 120-150 DEG C for 2-3 hours, so as to form uniform feed materials; (2) molding the feed materials on an injection molding machine when the temperature is 130-150 DEG C and the pressure is 100-120MPa, so as to obtain a blank with required product shape; (3) pre-sintering the product blank at 1500 DEG C after thermal debinding; and (4) sintering the pre-sintered product in a sintering furnace at 1800-1900 DEG C under protection of a nitrogen, so as to obtain the product. The product obtained by the method is high in dimensional accuracy, good in tenacity and mechanical property, and low in cost, and can be produced in batches.
Description
Technical field
The present invention relates to material technology field, particularly relate to the making method of silicon carbide whisker toughening silicon carbide goods.
Background technology
Silicon carbide composite ceramic materials, has excellent mechanical property and antioxidant property, thermal shock resistance, and erosion-resisting characteristics is widely used in pottery, metallurgy, electronics, machinery, chemical industry and military industry field.The fragility that silicon carbide composite ceramic materials itself is intrinsic is limited to it in high-temperature material field always, silicon carbide composite ceramic materials toughness reinforcing to become current research topic.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of making method of silicon carbide whisker toughening silicon carbide goods is provided, and this composite ceramic material product has more excellent toughness and mechanical property, thermal shock resistance and anti-oxidant and erosion-resisting characteristics.
The technical scheme adopting is:
The making method of silicon carbide whisker toughening silicon carbide goods, comprises the following steps:
(1) by selected silicon carbide micro-powder and silicon carbide whisker and binding agent in mixing roll at 120 ~ 150 ℃ mixing 2 ~ 3 hours, become uniform feeding;
(2) feeding 130 ~ 150 ℃ of temperature, 100 ~ 120Mpa forming under the pressure on injection moulding machine, obtains the shape Bear-grudge of required article shape;
(3) by goods shape Bear-grudge after hot degreasing, presintering at 1500 ℃ of temperature;
(4) goods of presintering are carried out to sintering in sintering oven under 1800 ~ 1900 ℃ of temperature, nitrogen protection, obtain goods.
Above-mentioned feeding silicon carbide micro-powder and silicon carbide whisker weight ratio are 100:8 ~ 20.
Above-mentioned binding agent is Polycarbosilane base Multi-component binder, paraffin, high density polyethylene(HDPE), stearic acid composition, its constituent element weight percent: Polycarbosilane base Multi-component binder: paraffin: high density polyethylene(HDPE): stearic acid=(40 ~ 60): (30 ?45): (5 ~ 10): (0 ~ 5);
The product's dimensional precision that the present invention obtains is high, and toughness and mechanical property are good, can be mass, and goods cost is low.
Embodiment
Embodiment mono-
By selected silicon carbide micro-powder and silicon carbide whisker with weight of binder than mixing for 100:8, Polycarbosilane base Multi-component binder: the binding agent of paraffin: high density polyethylene(HDPE): stearic acid=40:45:10:5 in mixing roll at 120 ℃ mixing 2 hours, becomes uniform feeding.Feeding is 140 ℃ of temperature, 110Mpa forming under the pressure on injection moulding machine, obtains the shape Bear-grudge of required article shape.By goods shape Bear-grudge after hot degreasing, presintering at 1500 ℃ of temperature.The goods of presintering carried out in sintering oven under 1850 ℃ of temperature, nitrogen protection to sintering and be incubated 1 hour, obtaining goods.
Embodiment bis-
By selected silicon carbide micro-powder and silicon carbide whisker with weight of binder than mixing for 100:15, Polycarbosilane base Multi-component binder: the binding agent of paraffin: high density polyethylene(HDPE): stearic acid=50:40:5:5 in mixing roll at 120 ℃ mixing 2 hours, becomes uniform feeding.Feeding is 150 ℃ of temperature, 100Mpa forming under the pressure on injection moulding machine, obtains the shape Bear-grudge of required article shape.By goods shape Bear-grudge after hot degreasing, presintering at 1500 ℃ of temperature.The goods of presintering carried out in sintering oven under 1850 ℃ of temperature, nitrogen protection to sintering and be incubated 2 hours, obtaining goods.
Embodiment tri-
By selected silicon carbide micro-powder and silicon carbide whisker with weight of binder than mixing for 100:15, Polycarbosilane base Multi-component binder: the binding agent of paraffin: high density polyethylene(HDPE): stearic acid=60:30:10:0 in mixing roll at 130 ℃ mixing 1.5 hours, becomes uniform feeding.Feeding is 150 ℃ of temperature, 110Mpa forming under the pressure on injection moulding machine, obtains the shape Bear-grudge of required article shape.By goods shape Bear-grudge after hot degreasing, presintering at 1500 ℃ of temperature.The goods of presintering carried out in sintering oven under 1900 ℃ of temperature, nitrogen protection to sintering and be incubated 2 hours, obtaining goods.
Claims (3)
1. the making method of silicon carbide whisker toughening silicon carbide goods, is characterized in that comprising the following steps:
(1) by selected silicon carbide micro-powder and silicon carbide whisker and binding agent in mixing roll at 120 ~ 150 ℃ mixing 2 ~ 3 hours, become uniform feeding;
(2) feeding 130 ~ 150 ℃ of temperature, 100 ~ 120Mpa forming under the pressure on injection moulding machine, obtains the shape Bear-grudge of required article shape;
(3) by goods shape Bear-grudge after hot degreasing, presintering at 1500 ℃ of temperature;
(4) goods of presintering are carried out to sintering in sintering oven under 1800 ~ 1900 ℃ of temperature, nitrogen protection, obtain goods.
2. the making method of silicon carbide whisker toughening silicon carbide goods according to claim 1, is characterized in that described feeding silicon carbide micro-powder and silicon carbide whisker weight ratio are 100:8 ~ 20.
3. the making method of silicon carbide whisker toughening silicon carbide goods according to claim 1, it is characterized in that described binding agent is Polycarbosilane base Multi-component binder, paraffin, high density polyethylene(HDPE), stearic acid composition, its constituent element weight percent: Polycarbosilane base Multi-component binder: paraffin: high density polyethylene(HDPE): stearic acid=(40 ~ 60): (30 ?45): (5 ~ 10): (0 ~ 5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310480116.5A CN103787685A (en) | 2013-10-15 | 2013-10-15 | Method for fabricating silicon carbide whisker-toughened silicon carbide product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310480116.5A CN103787685A (en) | 2013-10-15 | 2013-10-15 | Method for fabricating silicon carbide whisker-toughened silicon carbide product |
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| Publication Number | Publication Date |
|---|---|
| CN103787685A true CN103787685A (en) | 2014-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310480116.5A Pending CN103787685A (en) | 2013-10-15 | 2013-10-15 | Method for fabricating silicon carbide whisker-toughened silicon carbide product |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109627031A (en) * | 2019-01-29 | 2019-04-16 | 西北工业大学 | Tough ceramic matric composite of a kind of SiCw orientation height and preparation method thereof |
| CN109627029A (en) * | 2019-01-29 | 2019-04-16 | 西北工业大学 | A kind of preparation method of high thermal conductivity CNTs orientation modified ceramic based composites |
| CN113024268A (en) * | 2021-04-25 | 2021-06-25 | 上海大学绍兴研究院 | Blade root reinforced composite ceramic turbine blade and integrated forming method thereof |
-
2013
- 2013-10-15 CN CN201310480116.5A patent/CN103787685A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109627031A (en) * | 2019-01-29 | 2019-04-16 | 西北工业大学 | Tough ceramic matric composite of a kind of SiCw orientation height and preparation method thereof |
| CN109627029A (en) * | 2019-01-29 | 2019-04-16 | 西北工业大学 | A kind of preparation method of high thermal conductivity CNTs orientation modified ceramic based composites |
| CN109627031B (en) * | 2019-01-29 | 2021-10-22 | 西北工业大学 | SiCw oriented high-toughness ceramic matrix composite and preparation method thereof |
| CN109627029B (en) * | 2019-01-29 | 2021-10-22 | 西北工业大学 | Preparation method of high-thermal-conductivity CNTs (carbon nanotubes) oriented modified ceramic matrix composite |
| CN113024268A (en) * | 2021-04-25 | 2021-06-25 | 上海大学绍兴研究院 | Blade root reinforced composite ceramic turbine blade and integrated forming method thereof |
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Application publication date: 20140514 |