CN1173409A - Cosedimentation for preparing stainless steel-zirconium oxide continuous gradient functional material - Google Patents
Cosedimentation for preparing stainless steel-zirconium oxide continuous gradient functional material Download PDFInfo
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- CN1173409A CN1173409A CN 97104468 CN97104468A CN1173409A CN 1173409 A CN1173409 A CN 1173409A CN 97104468 CN97104468 CN 97104468 CN 97104468 A CN97104468 A CN 97104468A CN 1173409 A CN1173409 A CN 1173409A
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Abstract
A cosettling process for preparing stainless steel/zirconium oxide material with continuously gradient functio includes mixing the powder of stainless and zirconium oxide with liquid medium (alcohol, acetone and water) to obtain suspension, cosettling, shaping and sintering. The granularity is 0.5-20 microns for stainless or 0.1-60 microns for zirconium oxide. Their contents in suspension ar 0.01-0.5 glml for stainless and 0.02-0.3 g/m for zirconium oxide. Its advantages are high operatability and continuous distribution of components in gradient material.
Description
The invention belongs to the category of function-graded material.Function-graded material is a kind of advanced composite material (ACM) that development in recent years is got up, its principal character is that material one side is the heat-stable ceramic of lower thermal conductivity, opposite side is low temperature resistant metal, for relaxing thermal stress, composition between the both sides and (or) the institutional framework graded, thereby make material monolithic have the performance of metal and pottery concurrently, existing good hear resistance has enough obdurabilities again.Though the notion of function-graded material puts forward for research and development aerospace hides hot material at first, the category of function that present application " hides heat " head and shoulders above all has important use and is worth in fields such as biology, electronics, medical science, atomic energy.
The preparation of function-graded material is the key that function-graded material is used and developed.From thermal stress mitigation degree, the composition continuous distributed is the dreamboat that the function-graded material preparation field is pursued always.Developed at present the preparation method of multiple function-graded material,, powder metallurgic method synthetic or the like as vapour deposition, plasma spraying, self propagating high temperature.Wherein powder metallurgic method is considered to more flexibly, is hopeful one of method for preparing large-scale component, also is the more method of studying at present.But what present powder metallurgy process adopted mainly is lay-up method, promptly by design two kinds of powder press different components earlier and mixes, in layer lamination press forming and sintering then, composition layering step variation between the material both sides.This lay-up method owing to not have really is eliminated the interface that composition suddenlys change, thereby still is all to have significant limitation on the degree of stress mitigation from preparation technology's operability itself.Though also once the someone proposed to use " the powderject sedimentation " of spray deposition principle, and think and to prepare composition continually varying functionally gradient material (FGM), but because the composition control procedure is very complicated, the technology poor operability is not seen the sample that shaping is arranged so far yet.
The objective of the invention is to prepare the stainless steel/zirconium oxide gradient functional material of composition continuous distributed.
The sedimentation behavior of powder particle in liquid medium can be described with Stokes sedimentation equation, and the sedimentation that powder particle of the same race is thick is fast, and particle sedimentation thick, that density is big is fast during powder not of the same race sedimentation simultaneously (cosedimentation).Thereby for two kinds of different powder determining, by regulating sedimentation parameter (relative amounts of sedimentation density of medium and viscosity, two kinds of powder), suitably select the granularity of two kinds of powder, control the sedimentation behavior of two kinds of powder, just can obtain the sedimentary deposit of composition continuous transition.
Formation of the present invention is: stainless steel and Zirconium oxide powder and liquid medium are mixed and made into suspension and make its cosedimentation, utilization is with the difference of a kind of particle size differences of powder and density between powder of stainless steel and Zirconium oxide powder and granularity and the difference of the sinking speed that causes prepares composition never becomes rusty the steel continuous transition to the zirconia sedimentary deposit, and drying, shaping, sintering prepare stainless steel/zirconium oxide gradient functional material.Wherein liquid sedimentation medium can be ethanol, acetone and water; Stainless granularity (primary particle or secondary are granulated) is 0.5～20 μ m, and zirconic granularity (primary particle or secondary are granulated) is 0.1～60 μ m; Stainless content is 0.01～0.5g/ml in the suspension, and zirconic content is 0.02～0.3g/ml; Shaping can be mold pressing and static pressure such as grade, and forming pressure is 50～200MPa; Sintering atmosphere is Ar, and sintering temperature is 1200 ℃～1400 ℃, and the time is 30min～120min.
The invention has the advantages that technology is workable, prepared functionally gradient material (FGM) composition continuous distributed.
The invention will be further described in conjunction with the accompanying drawings for figure below:
Fig. 1 is composition (YSZ volume fraction) distribution curve in embodiment SUS316/YSZ (3Y) sample;
Fig. 2 is the composition distribution curve in embodiment SUS304/YSZ (3Y) sample;
Fig. 3 organizes photo (* 50) for embodiment SUS316/YSZ (3Y) functionally gradient material (FGM);
Fig. 4 organizes photo (* 50) for embodiment SUS304/YSZ (3Y) functionally gradient material (FGM).
Embodiment:
Adopt the inventive method (cosedimentation method), with yttrium partially stabilized zirconia (YSZ) powder and powder of stainless steel (Japanese SUS316 and SUS304 powder), as the sedimentation medium, the SUS316/YSZ (3Y) of φ 33 * 4.5mm (behind the sintering) and SUS304/YSZ (3Y) stainless steel/zirconia continuous gradient functional material of φ 33 * 2.2mm (behind the sintering) have been prepared with ethanol.Its technological parameter is as table (1).
Table (1) embodiment technological parameter
| SUS316/YSZ(3Y) | SUS304/YSZ(3Y) | ||
| Powder size (μ m) | Stainless steel | ????8 | ????6 |
| ????ZrO 2 | ????0.3 | ????0.3 | |
| The sedimentation medium | Ethanol | ||
| Suspension concentration (g/ml) | Stainless steel | ????90×10 -3 | ????118.5×10 -3 |
| ????ZrO 2 | ????45×10 -3 | ????38×10 -3 | |
| Sedimentary deposit forming pressure (MPa) | ????????????????150 | ||
| Sintering temperature (℃) | ????????????????1300 | ||
| Sintering time (min) | ?????????????????60 | ||
Claims (1)
1. the preparation method of stainless steel/zirconium oxide gradient functional material, it is characterized in that stainless steel and Zirconium oxide powder and liquid medium are mixed and made into suspension and make its cosedimentation, sedimentary deposit drying, shaping, sintering prepare stainless steel/zirconium oxide gradient functional material; Wherein stainless granularity (primary particle or secondary are granulated) is 0.5～20 μ m, and zirconic granularity (primary particle or secondary are granulated) is 0.1～60 μ m; Stainless content is 0.01～0.5g/ml in the suspension, and zirconic content is 0.02～0.3g/ml; Forming pressure is 50～200MPa, can be mold pressing, also can be to wait static pressure; Sintering temperature is 1200 ℃～1400 ℃, and the time is 30min～120min, and sintering atmosphere is Ar; The sedimentation medium can be ethanol, acetone and water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97104468A CN1101737C (en) | 1997-06-09 | 1997-06-09 | Cosedimentation for preparing stainless steel-zirconium oxide continuous gradient functional material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97104468A CN1101737C (en) | 1997-06-09 | 1997-06-09 | Cosedimentation for preparing stainless steel-zirconium oxide continuous gradient functional material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1173409A true CN1173409A (en) | 1998-02-18 |
| CN1101737C CN1101737C (en) | 2003-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN97104468A Expired - Fee Related CN1101737C (en) | 1997-06-09 | 1997-06-09 | Cosedimentation for preparing stainless steel-zirconium oxide continuous gradient functional material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077471C (en) * | 1999-06-30 | 2002-01-09 | 昆明理工大学 | Process for preparing gradient function material by foam metal interlayer method |
| CN107022711A (en) * | 2017-04-26 | 2017-08-08 | 中南大学 | A kind of Y2Ti2O7/ stainless steel functional gradient composite materials and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325688C (en) * | 2005-09-12 | 2007-07-11 | 北京科技大学 | Abrasion-resistant corrosion-resistant material and process for preparing the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6128608A (en) * | 1984-07-18 | 1986-02-08 | Sumitomo Electric Ind Ltd | Raising dam with rising and falling weir |
| US5455000A (en) * | 1994-07-01 | 1995-10-03 | Massachusetts Institute Of Technology | Method for preparation of a functionally gradient material |
| JP3437884B2 (en) * | 1995-08-11 | 2003-08-18 | ビステオンアジアパシフィック株式会社 | Vehicle air conditioning controller |
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1997
- 1997-06-09 CN CN97104468A patent/CN1101737C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077471C (en) * | 1999-06-30 | 2002-01-09 | 昆明理工大学 | Process for preparing gradient function material by foam metal interlayer method |
| CN107022711A (en) * | 2017-04-26 | 2017-08-08 | 中南大学 | A kind of Y2Ti2O7/ stainless steel functional gradient composite materials and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1101737C (en) | 2003-02-19 |
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