JPH06667B2 - Boride-aluminum nitride ceramic materials - Google Patents
Boride-aluminum nitride ceramic materialsInfo
- Publication number
- JPH06667B2 JPH06667B2 JP63280176A JP28017688A JPH06667B2 JP H06667 B2 JPH06667 B2 JP H06667B2 JP 63280176 A JP63280176 A JP 63280176A JP 28017688 A JP28017688 A JP 28017688A JP H06667 B2 JPH06667 B2 JP H06667B2
- Authority
- JP
- Japan
- Prior art keywords
- boride
- powder
- weight
- added
- sintering
- 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.)
- Expired - Lifetime
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、機械的特性および耐食特性に優れたホウ化物
−窒化物アルミニウム系セラミックスに関するものであ
る。TECHNICAL FIELD The present invention relates to a boride-nitride aluminum-based ceramics excellent in mechanical properties and corrosion resistance.
［従来の技術］ ホウ化金属、特にTiB2、ZrB2、HfB2は硬度が高く、ろう付
加工ができる上、溶融金属に対し耐食性があるため、耐
摩材料や溶融金属用電極等の多くの用途に用いられると
期待されている。[Prior Art] Metal boride, especially TiB 2 , ZrB 2 , and HfB 2 have high hardness, can be brazed, and have corrosion resistance against molten metal. Therefore, many materials such as wear-resistant materials and electrodes for molten metal can be used. It is expected to be used for various purposes.
しかしながら、これらホウ化金属の殆どは融点が高く、
難焼結性であり、高密度、高強度焼結体を得るため種々
の低融点物質を添加することにより、高密度化を計って
いる（例えば特公昭５９−３９９７号公報）。そのた
め、ホウ化金属が本来有する優れた特性を損なってしま
う。また焼結体中に低融点物質がそのまま残留し、この
残留部分が溶融金属に接触し、そこから腐食が生じると
いう問題があった。さらに、低融点物質を添加しない場
合（例えば特公昭６３−２０１０６７）には、焼結温度
が高くなり、そのために粒成長を引き起こし、耐食性は
優れているものの機械的強度の低い焼結体しか得られな
いという問題があった。However, most of these metal borides have high melting points,
It is difficult to sinter, and high density and high strength sintered bodies are obtained by adding various low melting point substances (for example, Japanese Patent Publication No. 59-3997). Therefore, the excellent characteristics originally possessed by the metal boride are impaired. Further, there is a problem that the low melting point substance remains as it is in the sintered body, and the remaining portion comes into contact with the molten metal, causing corrosion. Furthermore, when a low melting point substance is not added (for example, Japanese Examined Patent Publication No. 63-201067), the sintering temperature becomes high, which causes grain growth, resulting in only a sintered body having excellent corrosion resistance but low mechanical strength. There was a problem that I could not.
［発明が解決しようとする問題点］ 本発明は、上記低融点物質添加法の製品特性の低下とい
う問題を解決し、高密度、高強度かつ耐食性に優れた焼
結体を提供すること、および焼結温度を低くし、粒成長
を抑制することにより耐食性も優れかつ機械的性質にも
優れた焼結体を提供することを目的とする。[Problems to be Solved by the Invention] The present invention provides a sintered body that solves the problem of deterioration of product characteristics in the above-mentioned low melting point substance addition method and has high density, high strength, and excellent corrosion resistance, and It is an object of the present invention to provide a sintered body having excellent corrosion resistance and mechanical properties by lowering the sintering temperature and suppressing grain growth.
［問題点を解決するための手段］ 本発明の上記目的は、下記の如き手段を採用することで
達成できる。[Means for Solving Problems] The above object of the present invention can be achieved by adopting the following means.
MB2型ホウ化物、M2B5型ホウ化物、MB型ホウ化物の中か
ら選ばれた２種以上にAlNを全重量に対し１〜４５重量
％添加した混合粉末を焼結するかあるいは、上記混合粉
末に、さらにTi、Zr、Hf、V、Nb、Ta、Cr、Mo、W、Mnの内の１種
以上の金属粉末を全重量に対し０．１〜５０重量％添加
した粉末を焼結することにより得られる。Sinter a mixed powder in which 1 to 45 wt% of AlN is added to two or more selected from MB 2 type boride, M 2 B 5 type boride and MB type boride, or A powder obtained by further adding 0.1 to 50% by weight to the total weight of one or more metal powders of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and Mn to the mixed powder. It is obtained by sintering.
AlNの添加量が１％未満か４５％を越えると、焼結体の
機械的特性は悪くなる。If the amount of AlN added is less than 1% or more than 45%, the mechanical properties of the sintered body deteriorate.
また、Ti、Zr、Hf、V、Nb、Ta、Cr、Mo、W、Mnの金属粉の添加量
が０．１％未満もしくは５０％を越えると耐熱性や、耐
食性が悪くなる。Further, if the addition amount of the metal powder of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn is less than 0.1% or more than 50%, heat resistance and corrosion resistance are deteriorated.
本発明の材料を得るための焼結では、原料として用いる
粉末の酸化を防ぐために、非酸化性雰囲気であることが
好ましく、又、用いる原料粉末の粒径は出来る限り微細
である方がよく、通常４μｍ以下の平均粒子径、より好
ましくは１μｍ以下の平均粒径の粉末とする。In the sintering for obtaining the material of the present invention, in order to prevent the oxidation of the powder used as the raw material, a non-oxidizing atmosphere is preferable, and the particle size of the raw material powder used is preferably as fine as possible, Usually, the powder has an average particle diameter of 4 μm or less, more preferably 1 μm or less.
次に、本発明の代表的な方法について述べる。Next, a typical method of the present invention will be described.
まず所定の混合比に混合した粉末組成物を黒鉛型に入
れ、真空中で、黒鉛パンチに２００kg/cm2の荷重をかけ
ながら、１５００〜１８００℃で６０分程度焼結するホ
ットプレス法を用いることができる。First, a hot press method is used in which a powder composition mixed in a predetermined mixing ratio is put into a graphite mold and sintered in a vacuum at a temperature of 1500 to 1800 ° C. for about 60 minutes while applying a load of 200 kg / cm 2 to a graphite punch. be able to.
また、別の方法としては、普通焼結法やH.I.P法を採用
しても容易に十分な緻密な焼結体が得られる。Further, as another method, a sufficiently dense sintered body can be easily obtained even if the ordinary sintering method or the HIP method is adopted.
［実施例１］ 次に実施例を示し、本発明方法を更に詳述する。Example 1 Next, the method of the present invention will be described in more detail with reference to examples.
TiB2粉末に全重量に対し５重量％のTaB2を混合した粉末
を基本成分とし、それに全重量の１５重量％のAlN粉末
を混合し、この混合粉末を黒鉛型に充填した後、真空中
で、２００kg/cm2のダイ圧力のもとで１６００℃に６０
分間焼結した。得られた焼結体の空隙はほとんど見られ
なかった。またその抵折力、ビッカース硬度および破壊
靱性値K1Cは、それぞれ、９０kg/mm2、Hv２４００およ
び４MPam1/2であった。なお、TiB2粉末のみを同一条件
でホットプレス焼結しても、空隙の多い焼結体が得られ
るが、抗折力試験片に加工することは不可能なほど、多
孔質であった。その他の実施例を表１に示す。表１に示
すように、２種のホウ化物にAlNを添加した焼結体は、
低融点金属を加えなくとも焼結温度１６００℃という低
い温度で緻密化し、しかも抗折力の高いことがわかる。The basic component is a powder obtained by mixing 5 wt% of TaB 2 with the TiB 2 powder, and 15 wt% of the total weight of AlN powder is mixed with the powder. At a die pressure of 200 kg / cm 2 at 1600 ° C 60
Sintered for minutes. The voids in the obtained sintered body were hardly seen. Further, its bending strength, Vickers hardness and fracture toughness value K 1C were 90 kg / mm 2 , Hv 2400 and 4 MPam 1/2 , respectively. Even if only TiB 2 powder was hot-press sintered under the same conditions, a sintered body with many voids was obtained, but it was so porous that it could not be processed into a transverse rupture strength test piece. Other examples are shown in Table 1. As shown in Table 1, the sintered body obtained by adding AlN to two types of borides is
It can be seen that even if the low melting point metal is not added, the densification is performed at a low temperature of 1600 ° C. and the bending strength is high.
［実施例２］ TiB2粉末に全重量の５％のTiB粉末と１５重量％のAlN粉
末を加えた混合粉末を基本とし、それに全重量の３重量
％のTi粉末を混合し、１５００℃で６０分間、真空中で
ホットプレスした。その結果を表２、No.２に示す。そ
の他、金属粉末を加えた例を表２に示している。Example 2 Based on a mixed powder obtained by adding 5% by weight of TiB powder and 15% by weight of AlN powder to TiB 2 powder, 3% by weight of Ti powder by weight was mixed, and the mixture was heated at 1500 ° C. Hot pressed in vacuum for 60 minutes. The results are shown in Table 2, No.2. In addition, Table 2 shows an example in which metal powder is added.
なお、表１と表２に実施例を示しているが、実施例に示
されないホウ化物の内MB2型とM2B5型ホウ化物の特性はT
iB2と同一の焼結特性を有するし、MB型ホウ化物はTiBや
MoBと同一の性質を有することが判明している。さら
に、Ti、Zr以外の添加金属もTi、Zrと同様にホウ化物と反
応し、焼結時における緻密化を容易にすることは明らか
である。Although Examples are shown in Tables 1 and 2, among the boride compounds not shown in the examples, the characteristics of MB 2 type and M 2 B 5 type boride are T
It has the same sintering characteristics as iB 2 and MB-type boride has TiB and
It has been found to have the same properties as MoB. Further, it is apparent that the added metals other than Ti and Zr react with borides in the same manner as Ti and Zr to facilitate densification during sintering.
又表２に示すように、高融点金属を添加した系にさらに
AlNを定量添加すると焼結温度か低下するばかりでな
く、抗折力も改善されることがわかる。Further, as shown in Table 2, in the system to which the high melting point metal is added,
It can be seen that the addition of AlN in a fixed amount not only lowers the sintering temperature but also improves the transverse rupture strength.
Claims (2)
B2、MnB2、AlB2のMB2型ホウ化物、W2B5、Mo2B5のM2B5型ホ
ウ化物、TiB、ZrB、HfB、VB、NbB、TaB、CrB、MoB、MnBのMB型ホ
ウ化物の中から選ばれた２種以上にAlNを全重量に対し
１〜４５重量％添加した混合粉末を焼結して得られるセ
ラミックス材料。1. TiB 2 , ZrB 2 , HfB 2 , VB 2 , NbB 2 , TaB 2 , CrB 2 , Mo
B 2, MnB 2, AlB 2 of MB 2 type boride, W 2 B 5, Mo 2 M 2 B 5 type borides of B 5, TiB, ZrB, HfB , VB, NbB, TaB, CrB, MoB, MnB A ceramic material obtained by sintering a mixed powder in which 1 to 45% by weight of AlN is added to two or more kinds selected from the above MB type boride.
ウ化物、MB型ホウ化物の中から選ばれた２種以上の粉末
にAlNを全重量に対し１〜４５重量％添加した粉末を基
本成分とし、これにTi、Zr、Hf、V、Nb、Ta、Cr、Mo、W、Mnの内
の１種以上の金属粉末を全重量に対し０．１〜５０重量
％添加した粉末を焼結して得られるセラミックス材料。2. The powder of two or more kinds selected from the MB 2 boride, M 2 B 5 type boride and MB type boride according to claim 1, and AlN in an amount of 1 to 45% by weight based on the total weight. % Added powder as a basic component, and 0.1 to 50 weight% of the total weight of one or more metal powders of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and Mn. % A ceramic material obtained by sintering the added powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63280176A JPH06667B2 (en) | 1988-11-04 | 1988-11-04 | Boride-aluminum nitride ceramic materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63280176A JPH06667B2 (en) | 1988-11-04 | 1988-11-04 | Boride-aluminum nitride ceramic materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02129074A JPH02129074A (en) | 1990-05-17 |
| JPH06667B2 true JPH06667B2 (en) | 1994-01-05 |
Family
ID=17621358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63280176A Expired - Lifetime JPH06667B2 (en) | 1988-11-04 | 1988-11-04 | Boride-aluminum nitride ceramic materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06667B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4268314A (en) * | 1979-12-21 | 1981-05-19 | Union Carbide Corporation | High density refractory composites and method of making |
| JPS63201067A (en) * | 1987-02-13 | 1988-08-19 | 工業技術院長 | Manufacture of metal diboride base ceramics |
-
1988
- 1988-11-04 JP JP63280176A patent/JPH06667B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| 特開昭６３−２０１０６７ＪＰ，Ａ） |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02129074A (en) | 1990-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |