JPH093562A - Method for producing Nb-Al intermetallic compound - Google Patents
Method for producing Nb-Al intermetallic compoundInfo
- Publication number
- JPH093562A JPH093562A JP17671395A JP17671395A JPH093562A JP H093562 A JPH093562 A JP H093562A JP 17671395 A JP17671395 A JP 17671395A JP 17671395 A JP17671395 A JP 17671395A JP H093562 A JPH093562 A JP H093562A
- Authority
- JP
- Japan
- Prior art keywords
- intermetallic compound
- powder
- producing
- average particle
- average
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
(57)【要約】
【目的】 Ｎｂ−Ａｌ金属間化合物を高い収率で製造す
る。
【構成】 Ｎｂ−Ａｌ金属間化合物が、平均粒径：２０
〜７０μｍのＮｂ粉末の表面を平均層厚：１〜１０μｍ
のＡｌで被覆してなる被覆複合粉末をプラズマジェット
加熱することにより製造される。(57) [Summary] [Objective] Nb-Al intermetallic compounds are produced in high yield. [Structure] The Nb-Al intermetallic compound has an average particle size of 20.
The average layer thickness on the surface of Nb powder of ˜70 μm: 1-10 μm
It is produced by plasma jet heating a coated composite powder formed by coating with Al.
Description
【０００１】[0001]
【産業上の利用分野】この発明は、高い収率でＮｂ−Ａ
ｌ金属間化合物を製造する方法に関するものである。FIELD OF THE INVENTION The present invention provides a high yield of Nb-A.
The present invention relates to a method for producing an intermetallic compound.
【０００２】[0002]
【従来の技術】従来、一般にＮｂ−Ａｌ金属間化合物
は、高融点を有し、かつ耐熱性にすぐれていることか
ら、これらの特性が要求されるジェットエンジン部品の
製造や、耐熱被覆層の形成などに広く用いられている。
また、Ｎｂ−Ａｌ金属間化合物の製造方法としては、例
えば特開平３−２２９８３２号公報、特開平７−４５２
０１号公報、および特開平４−２２１０２９号公報など
に記載される通り、各種の方法が提案されている。2. Description of the Related Art Conventionally, Nb-Al intermetallic compounds generally have a high melting point and excellent heat resistance, so that they are used in the production of jet engine parts that require these characteristics and in heat resistant coating layers. Widely used for forming.
Further, as a method for producing the Nb-Al intermetallic compound, for example, JP-A-3-229832 and JP-A-7-452 are disclosed.
Various methods have been proposed as described in JP-A No. 01, JP-A-4-221029, and the like.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記の従来方
法でＮｂ−Ａｌ金属間化合物を製造した場合、いずれの
方法によってもＮｂ−Ａｌ金属間化合物の収率が低く、
高々８０％程度の収率しか得られないのが現状である。However, when the Nb-Al intermetallic compound is produced by the above-mentioned conventional method, the yield of the Nb-Al intermetallic compound is low by any method,
The present situation is that only a yield of about 80% at most can be obtained.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者等は、
上述のような観点から、高い収率でＮｂ−Ａｌ金属間化
合物を製造すべく研究を行なった結果、Ｎｂ粉末の表面
をＡｌで被覆した被覆複合粉末を用意し、この被覆複合
粉末に、プラズマ溶射装置を用い、プラズマジェットに
よる加熱を施すと、この結果の溶射層は、コア粉末のＮ
ｂと被覆層のＡｌが反応して形成された金属間化合物で
構成されるようになり、９５％以上の高い収率でのＮｂ
−Ａｌ金属間化合物の製造が可能になるという研究結果
を得たのである。Means for Solving the Problems Accordingly, the present inventors have
From the above-mentioned viewpoint, as a result of conducting research to produce the Nb-Al intermetallic compound in a high yield, a coated composite powder in which the surface of the Nb powder was coated with Al was prepared, and the coated composite powder was treated with plasma. When heating is performed by a plasma jet using a thermal spraying device, the resulting thermal sprayed layer is N of core powder.
b and Al of the coating layer are reacted with each other to form an intermetallic compound, and Nb with a high yield of 95% or more is obtained.
We obtained the research result that the production of -Al intermetallic compound becomes possible.
【０００５】この発明は、上記の研究結果にもとづいて
なされたものであって、平均粒径：２０〜７０μｍのＮ
ｂ粉末の表面を平均層厚：１〜１０μｍのＡｌで被覆し
てなる被覆複合粉末を、プラズマジェット加熱すること
により高い収率でＮｂ−Ａｌ金属間化合物を製造する方
法に特徴を有するものである。The present invention has been made based on the above research results, and has an average particle diameter of 20 to 70 μm N.
b The surface of the powder is coated with Al having an average layer thickness of 1 to 10 μm, which is characterized by a method for producing an Nb-Al intermetallic compound in a high yield by heating with a plasma jet. is there.
【０００６】なお、この発明の方法において、Ｎｂ粉末
の平均粒径を２０〜７０μｍとしたのは、その平均粒径
が２０μｍ未満では粉末の送給性が悪く、均一な反応を
行なわせるのが困難になり、一方その平均粒径が７０μ
ｍを越えると、未反応のＮｂが芯部に残留するようにな
って収率低下の原因になるという理由にもとづくもので
あり、望ましくは３０〜４０μｍの平均粒径がよい。ま
た、同じくＡｌ被覆層の平均層厚を１〜１０μｍとした
のは、その平均層厚が１μｍ未満では未反応のＮｂの残
留は避けられず、これは収率低下をもたらし、一方その
平均層厚が１０μｍを越えると、Ｎｂ−Ａｌ金属間化合
物における例えば相対的に融点の低いＮｂＡｌ（融点：
１５５０℃）の割合が融点の高いＮｂ3 Ａｌ（融点：１
９６０℃）に比して多くなり、所望の高融点を確保する
ことができないという理由によるものであり、望ましく
は２〜５μｍの平均層厚とするのがよい。In the method of the present invention, the Nb powder has an average particle size of 20 to 70 μm. When the average particle size is less than 20 μm, the powder feeding property is poor and a uniform reaction is performed. Difficult, while the average particle size is 70μ
This is because unreacted Nb will remain in the core portion if it exceeds m, which causes a decrease in yield. Desirably, an average particle size of 30 to 40 μm is preferable. Further, similarly, the average layer thickness of the Al coating layer is set to 1 to 10 μm, because when the average layer thickness is less than 1 μm, unreacted Nb remains inevitably, which causes a decrease in yield, while When the thickness exceeds 10 μm, for example, NbAl having a relatively low melting point (melting point:
1550 ° C.) has a high melting point of Nb 3 Al (melting point: 1
This is due to the reason that the desired high melting point cannot be secured, and the average layer thickness is preferably 2 to 5 μm.
【０００７】[0007]
【実施例】つぎに、この発明の方法を実施例にり具体的
に説明する。それぞれ表１に示される各種の平均粒径を
有するＮｂ粉末と平均粒径：２．１μｍのＡｌ粉末を用
意し、これら両粉末を表１に示される割合に配合し、こ
れをミキサーにて直径６mmのステンレス鋼ボールと共に
混合した後、さらにステンレス鋼製密閉容器に装入し、
ここで擦り潰すように撹拌してＮｂ粉末の表面が同じく
表１に示される平均層厚のＡｌで被覆された被覆複合粉
末を形成し、これをプラズマ溶射装置を用いて、 プラズマガス：Ａｒ、 プラズマガス流量：１．１×１０-3ｍ3 ／sec.、 電流：４００Ａ、 電圧：８０Ｖ、 粉末供給速度：０．５gr／sec 、 キャリアガス流量：５．７×１０-5ｍ3 ／sec 、 溶射距離：３００mm フェース面移動速度：５０mm／sec 、 の条件でプラズマジェット加熱し、重量％で、Ｎｉ−１
９％Ｃｒ−１９％Ｆｅ−３％Ｍｏの組成を有するＮｉ基
合金（ＭＡ７１８）からなる厚さ：５mmの板材の表面
に、いずれも平均層厚：２００μｍの溶射層を形成する
ことにより本発明法１〜８をそれぞれ実施した。EXAMPLES Next, the method of the present invention will be specifically described by way of examples. Nb powders having various average particle diameters shown in Table 1 and Al powders having an average particle diameter of 2.1 μm were prepared, and both powders were mixed in the proportions shown in Table 1, and the diameters were mixed with a mixer. After mixing with 6 mm stainless steel balls, further load into a stainless steel closed container,
Here, the surface of the Nb powder was agitated so as to be crushed to form a coated composite powder in which the surface of the Nb powder was also coated with Al having an average layer thickness shown in Table 1. Plasma gas flow rate: 1.1 × 10 -3 m 3 / sec., Current: 400 A, voltage: 80 V, powder supply rate: 0.5 gr / sec, carrier gas flow rate: 5.7 × 10 -5 m 3 / sec , Spraying distance: 300 mm, face surface moving speed: 50 mm / sec, plasma jet heating was performed under conditions of Ni-1 by weight%.
The present invention is formed by forming a sprayed layer having an average layer thickness of 200 μm on the surface of a plate material having a thickness of 5 mm and made of a Ni-based alloy (MA718) having a composition of 9% Cr-19% Fe-3% Mo. Methods 1 to 8 were performed respectively.
【０００８】この結果得られた溶射層の適宜５ヶ所の断
面を光学顕微鏡で観察し、それぞれの断面におけるＮｂ
−Ａｌ金属間化合物の割合、すなわち収率を画像解析装
置を用いて測定した。この測定結果を５ヶ所の平均値と
して表１に示した。Appropriately 5 cross sections of the resulting sprayed layer were observed with an optical microscope, and Nb in each cross section was observed.
The ratio of the -Al intermetallic compound, that is, the yield was measured using an image analyzer. The results of this measurement are shown in Table 1 as an average value at 5 points.
【０００９】[0009]
【表１】 [Table 1]
【００１０】[0010]
【発明の効果】表１に示される結果から、本発明法１〜
８によれば、９５％以上の高い収率で、すなわち被覆複
合粉末を構成するＮｂ粉末とＡｌ被覆層と十分反応さ
せ、未反応のＮｂやＡｌが僅かに残留するか、あるいは
ほとんど残留することなく、Ｎｂ−Ａｌ金属間化合物を
製造することができることが明らかである。上述のよう
に、この発明の方法によれば、高い収率でＮｂ−Ａｌ金
属間化合物を製造することができ、したがってこの方法
を用いて溶射層を形成すれば、溶射層はほとんどがＮｂ
−Ａｌ金属間化合物からなるので、高融点を有し、かつ
耐熱性のすぐれたものとなり、また前記溶射層を剥し
て、粉砕し、これを通常の粉末冶金法にて焼結体に形成
すれば、この焼結体はきわめて高い含有割合のＮｂ−Ａ
ｌ金属間化合物からなるので、すぐれた特性を具備する
ようになるなど工業上有用な効果がもたらされるのであ
る。From the results shown in Table 1, the method of the present invention 1 to
According to No. 8, a high yield of 95% or more, that is, Nb powder constituting the coated composite powder and Al coating layer are sufficiently reacted, and unreacted Nb and Al slightly remain or almost remain. It is clear that it is possible to produce Nb-Al intermetallic compounds without. As described above, according to the method of the present invention, it is possible to produce the Nb-Al intermetallic compound in a high yield. Therefore, if the thermal sprayed layer is formed using this method, most of the thermal sprayed layer is Nb.
-Al intermetallic compound has a high melting point and excellent heat resistance. Further, the thermal sprayed layer is peeled off and crushed, and this is formed into a sintered body by an ordinary powder metallurgy method. For example, this sintered body has an extremely high content of Nb-A.
Since it is composed of an intermetallic compound, it has industrially useful effects such as having excellent properties.
Claims (1)
表面を平均層厚：１〜１０μｍのＡｌで被覆してなる被
覆複合粉末を、プラズマジェット加熱することを特徴と
するＮｂ−Ａｌ金属間化合物の製造方法。1. A Nb-Al metal characterized by subjecting a coated composite powder obtained by coating the surface of Nb powder having an average particle diameter of 20 to 70 μm with Al having an average layer thickness of 1 to 10 μm to plasma jet heating. Method for producing intermetallic compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17671395A JPH093562A (en) | 1995-06-20 | 1995-06-20 | Method for producing Nb-Al intermetallic compound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17671395A JPH093562A (en) | 1995-06-20 | 1995-06-20 | Method for producing Nb-Al intermetallic compound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH093562A true JPH093562A (en) | 1997-01-07 |
Family
ID=16018466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17671395A Withdrawn JPH093562A (en) | 1995-06-20 | 1995-06-20 | Method for producing Nb-Al intermetallic compound |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH093562A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011208166A (en) * | 2010-03-27 | 2011-10-20 | Iwate Industrial Research Center | Film-forming method and film-forming member |
| JP2011208165A (en) * | 2010-03-27 | 2011-10-20 | Iwate Industrial Research Center | Film material for cold spray and method for producing the same |
-
1995
- 1995-06-20 JP JP17671395A patent/JPH093562A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011208166A (en) * | 2010-03-27 | 2011-10-20 | Iwate Industrial Research Center | Film-forming method and film-forming member |
| JP2011208165A (en) * | 2010-03-27 | 2011-10-20 | Iwate Industrial Research Center | Film material for cold spray and method for producing the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020903 |