JPH0464265A - Thermoelectric conversion material of sic fiber reinforced fe silicide and manufacture thereof - Google Patents
Thermoelectric conversion material of sic fiber reinforced fe silicide and manufacture thereofInfo
- Publication number
- JPH0464265A JPH0464265A JP2176870A JP17687090A JPH0464265A JP H0464265 A JPH0464265 A JP H0464265A JP 2176870 A JP2176870 A JP 2176870A JP 17687090 A JP17687090 A JP 17687090A JP H0464265 A JPH0464265 A JP H0464265A
- Authority
- JP
- Japan
- Prior art keywords
- silicide
- sic
- thermoelectric conversion
- conversion material
- whiskers
- 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.)
- Pending
Links
- 229910021332 silicide Inorganic materials 0.000 title claims abstract description 66
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000000463 material Substances 0.000 title claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 44
- 239000000835 fiber Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 37
- 239000011159 matrix material Substances 0.000 claims abstract description 16
- 229910021431 alpha silicon carbide Inorganic materials 0.000 claims abstract description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 10
- 238000007731 hot pressing Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 52
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 8
- 230000035939 shock Effects 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 4
- 238000013001 point bending Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229910052839 forsterite Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 241000270299 Boa Species 0.000 description 1
- 229910005347 FeSi Inorganic materials 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical class [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 150000001868 cobalt Chemical class 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 150000002696 manganese Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、様々な熱源を利用して直接発電を行うこと
のできるＦｅ珪化物を主成分としたマトリックス中に炭
化珪素（以下、ＳｉＣと記す）を分散強化した強度の優
れた熱電変換材料に関するものであり、この熱電変換材
料は、例えば、ガス器具用電磁弁を開状態に保つための
電源などに使用する熱電素子製造用材料に関するもので
ある。[Detailed Description of the Invention] [Industrial Application Field] This invention is based on silicon carbide (hereinafter referred to as SiC) in a matrix mainly composed of Fe silicide, which can directly generate electricity using various heat sources. This thermoelectric conversion material is related to a thermoelectric conversion material with excellent strength that is dispersed and strengthened, and this thermoelectric conversion material is related to a material for manufacturing thermoelectric elements used in, for example, power sources for keeping solenoid valves for gas appliances open. It is.
一般に、熱電変換材料の１つとしてＦｅ珪化物が知られ
ており、このＦｅ珪化物は耐熱および耐酸化性に優れ、
かつ安価な材料であるために広く用いられている。Generally, Fe silicide is known as one of the thermoelectric conversion materials, and this Fe silicide has excellent heat resistance and oxidation resistance.
It is also widely used because it is an inexpensive material.
このＦｅ珪化物熱電変換材料には、ｎ型Ｆｅ珪化物熱電
変換材料とｎ型Ｆｅ珪化物熱電変換材料があり、このｎ
型Ｆｅ珪化物熱電変換材料とｎ型Ｆｅ珪化物熱電変換材
料とをＵ字形に接合して熱電素子を作製している。This Fe silicide thermoelectric conversion material includes an n-type Fe silicide thermoelectric conversion material and an n-type Fe silicide thermoelectric conversion material.
A thermoelectric element is manufactured by joining a type Fe silicide thermoelectric conversion material and an n type Fe silicide thermoelectric conversion material in a U-shape.
上記ｎ型Ｆｅ珪化物熱電変換材料は、Ｆｅ５ｊ２にＦｅ
よりｆＳ電子が１個少ないマンガン元素周期表系列、ま
たＳｉより価電子が１個少ないアルミニウム元素周期表
系列の元素から選ばれた１種または２種以上をドープし
て作製し、一方、ｎ型Ｆｅ珪化物熱電変換材料は、Ｆ
ｅ Ｓ ｌ ２にＦｅより価電子が１個多いコバルト元
素周期表系列、またＳｉより価電子が１個多いｓｂ元素
周期表系列の元素から選ばれた１種または２種以上をド
ープして作製されることも知られている。これらＦｅ珪
化物熱電変換材料で作製された熱電素子は一般に熱衝撃
に弱いために、急熱および急冷の繰返しによる使用中に
、破損されやすく、この点を改良するために、Ｆｅ珪化
物熱電変換材料にボロン元素を０．５〜４，６重量％含
有させたＦｅ珪化物熱電変換材料も提供されている（特
開昭５９−５６７８１号公報参照）。The above n-type Fe silicide thermoelectric conversion material contains Fe5j2 and Fe5j2.
It is prepared by doping with one or more elements selected from the elements of the periodic table series of manganese elements, which have one less fS electron than Si, and the elements of the periodic table series of aluminum elements, which have one less valence electron than Si; Fe silicide thermoelectric conversion material is F
Produced by doping e S l 2 with one or more selected from the elements of the periodic table series of cobalt elements, which have one more valence electron than Fe, and the elements of the periodic table series of sb elements, which have one more valence electron than Si. It is also known that Thermoelectric elements made with these Fe silicide thermoelectric conversion materials are generally susceptible to thermal shock and are easily damaged during use due to repeated rapid heating and cooling.In order to improve this point, Fe silicide thermoelectric conversion Fe silicide thermoelectric conversion materials containing 0.5 to 4.6% by weight of boron element have also been provided (see Japanese Patent Laid-Open No. 59-56781).
しかし、上記ボロン含有Ｆｅ珪化物熱電変換材料は、耐
熱衝撃性は改善されているものの全体的な機械的強度は
十分でなく、取付は作業中に簡単に損傷したり、また耐
熱衝撃性も十分でなく急熱急冷の繰り返し使用により破
壊してしまうなどといった問題点があった。However, although the boron-containing Fe silicide thermoelectric conversion material has improved thermal shock resistance, its overall mechanical strength is not sufficient, and the installation is easily damaged during work, and the thermal shock resistance is not sufficient. However, there was a problem in that it could be destroyed by repeated use of rapid heating and cooling.
そこで、本発明者等は、−層機械的強度および耐熱衝撃
性の優れたＦｅ珪化物熱電変換材料を得べく研究を行っ
た結果、
Ｆｅ珪化物マトリックス中にＳｉＣの短繊維またはウィ
スカーを分散させることにより、熱電特性を損うことな
く機械的強度を飛躍的に向上させ、さらに耐熱衝撃性を
一層向上させることかできるという知見を得たのである
。Therefore, the present inventors conducted research to obtain an Fe silicide thermoelectric conversion material with excellent mechanical strength and thermal shock resistance, and found that SiC short fibers or whiskers were dispersed in an Fe silicide matrix. By doing so, we obtained the knowledge that it is possible to dramatically improve mechanical strength and further improve thermal shock resistance without impairing thermoelectric properties.
この発明は、かかる知見にもとづいてなされたものであ
って、
Ｆｅ珪化物マトリックス中にＳｉＣの短繊維またはウィ
スカーを分散し強化したＳｉＣ繊維強化Ｆｅ珪化物熱電
変換材料に特徴を有するものである。The present invention was made based on this knowledge, and is characterized by a SiC fiber-reinforced Fe silicide thermoelectric conversion material in which SiC short fibers or whiskers are dispersed and reinforced in an Fe silicide matrix.
一般に、ＳｉＣにはα−３ｉＣとβ−ＳｉＣがあり、そ
の極性はα−ＳｉＣがｐ型でβ−ＳｉＣがｎ型であると
ころから、ｎ型Ｆｅ珪化物熱電変換材料中に分散させる
ＳｉＣの短繊維またはウィスカーはα−ＳｉＣの短繊維
またはウィスカーであることか必要であり、一方、ｎ型
Ｆｅ珪化物熱電変換材料中に分散させるＳｉＣの短繊維
またはウィスカーはβ−３ｉＣの短繊維またはウィスカ
ーであることが必要である。また、α−ＳｉＣおよびβ
−３ｉＣの短繊維またはウィスカーは、それぞれｐ型Ｆ
ｅ珪化物マトリックスおよびｎ型Ｆｅ珪化物マトリック
スに対して配向して分散している方か繊維強化の効果が
大きく好ましい。上記α−ＳｉＣおよびβ−ＳｉＣの短
繊維またはウィスカーの分散量か５容量％未満では十分
な機械的強度か得られず、一方、５０容量％を越えて分
散すると十分に緻密化せず、密度比が９０％に達しない
ので好ましくない。In general, there are two types of SiC: α-3iC and β-SiC. The polarity of α-SiC is p-type and β-SiC is n-type. Therefore, SiC dispersed in an n-type Fe silicide thermoelectric conversion material is It is necessary that the short fibers or whiskers be α-SiC short fibers or whiskers, while the SiC short fibers or whiskers dispersed in the n-type Fe silicide thermoelectric conversion material are β-3iC short fibers or whiskers. It is necessary that Also, α-SiC and β
−3iC short fibers or whiskers are each p-type F
It is preferable that the fibers are oriented and dispersed in the e-silicide matrix and the n-type Fe silicide matrix because of the greater effect of fiber reinforcement. If the above-mentioned α-SiC and β-SiC short fibers or whiskers are dispersed in an amount less than 5% by volume, sufficient mechanical strength cannot be obtained.On the other hand, if the amount of dispersed short fibers or whiskers in α-SiC and β-SiC is less than 50% by volume, sufficient densification is not achieved, resulting in This is not preferable because the ratio does not reach 90%.
したがって、ｎ型Ｆｅ珪化物熱電変換材料に分散するα
−ＳｉＣの短繊維またはウィスカーの量およびｎ型Ｆｅ
珪化物熱電変換材料に分散するβ−３ｉＣの短繊維また
はウィスカーの量は、いずれも５〜５０容量％に定めた
。Therefore, α dispersed in the n-type Fe silicide thermoelectric conversion material
- Amount of short fibers or whiskers in SiC and n-type Fe
The amount of β-3iC short fibers or whiskers dispersed in the silicide thermoelectric conversion material was set at 5 to 50% by volume.
一般に市販されているＳｉＣの短繊維またはウィスカー
は、直径：０１〜３０−５長さ：２０〜１０００即の寸
法を有するβ−３ｉＣの短繊維またはウィスカーである
から、それをそのままｎ型Ｆｅ珪化物マトリックス中に
分散させることができるが、ｎ型Ｆｅ珪化物マトリック
ス中に分散するαＳｉＣの短繊維またはウィスカーを得
るには、上記市販のβ−ＳｉＣの短繊維またはウィスカ
ーを温度： ２１００℃で熱処理しなければならない。Generally commercially available SiC short fibers or whiskers are β-3iC short fibers or whiskers with diameter: 01 to 30-5 length: 20 to 1000, so they can be converted into n-type Fe silicide as they are. In order to obtain short fibers or whiskers of α-SiC which can be dispersed in an n-type Fe silicide matrix, the above commercial short fibers or whiskers of β-SiC are heat-treated at a temperature of 2100°C. Must.
この発明のＳｉＣ繊維強化Ｆｅ珪化物熱電変換材料を用
いて熱電素子を製造するには、αＳｉＣの短繊維または
ウィスカーを含有するｐ型Ｆｅ珪化物粉末およびβ−Ｓ
ｉＣの短繊維またはウィスカーを含有するｎ型Ｆｅ珪化
物粉末を、方で接合するようにそれらの間に絶縁物とし
て熱処理済のフォルステライト粉末またはフォルステラ
イトのグリーンシートをはさみ込む形で黒鉛製ホットプ
レスモールドに充填し、これを温度：１０５０〜１１９
０℃、圧力： ５（１−２５０ｋｇ／ ｃｄ、保持時間
：１０〜６０分の条件で真空ホットプレスする方法か最
も適している。また、α−ＳｉＣの短繊維またはウィス
カーを自存するｐ型Ｆｅ珪化物粉末およびβ−ＳｉＣの
短繊維またはウィスカーを０型Ｆｅ珪化物粉末をＵ字形
の底で接合するようにＵ字金型に充填し、プレス成形し
てＵ字形圧粉体を作製し、このＵ字形圧粉体を温度：
１０５０〜１１９０℃、圧力： ５０〜２５０ｋｇ／
ｃｄ、真空中１０〜６０分間保持の条件でホットプレス
する方法でも可能である。In order to manufacture a thermoelectric element using the SiC fiber-reinforced Fe silicide thermoelectric conversion material of the present invention, p-type Fe silicide powder containing αSiC short fibers or whiskers and β-S
An n-type Fe silicide powder containing iC short fibers or whiskers is bonded with a heat-treated forsterite powder or forsterite green sheet as an insulator between them. Fill a press mold and heat it to a temperature of 1050 to 119
The most suitable method is vacuum hot pressing under the conditions of 0°C, pressure: 5 (1-250 kg/cd, holding time: 10-60 minutes). A U-shaped mold is filled with silicide powder and short fibers or whiskers of β-SiC so as to join the 0-type Fe silicide powder at the bottom of the U-shape, and press-molded to produce a U-shaped powder compact, Temperature of this U-shaped powder compact:
1050-1190℃, pressure: 50-250kg/
It is also possible to use a method of hot pressing under the conditions of cd and holding in vacuum for 10 to 60 minutes.
上記ホットプレスは、−軸圧縮であるために、α−Ｓｉ
Ｃの短繊維またはウィスカーおよびβＳｉＣの短繊維ま
たはウィスカーを圧縮方向に垂直な面内に配向し、Ｆｅ
珪化物を塑性変形させて密度比：９０％以上に緻密化す
ることかできる。Since the above hot press is -axial compression, α-Si
C short fibers or whiskers and βSiC short fibers or whiskers are oriented in a plane perpendicular to the compression direction, and Fe
It is possible to plastically deform the silicide and make it denser to a density ratio of 90% or more.
上記ホットプレス条件が、温度： １０５０℃未満およ
び圧力：５０ｋｇ／ｃｄ未満ては十分に緻密化せず、密
度比＝９０％に達しないところから、温度＋ １０５０
℃以上および圧力＋５０）ｃｇ／ｃ−以上を必要とする
が、温度＋ １１９０℃を越えるとＦｅ珪化物粒子の粒
成長が著しくなるだけでなくＦｅ珪化物がホットプレス
モールドから溶出することかあるので好ましくない。ま
た圧力：ｌ５０ｋｇ／ｃ−を越えると黒鉛製ポットプレ
スモールドの強度が限界に達するので好ましくない。If the above hot pressing conditions are: temperature: less than 1050 ° C. and pressure: less than 50 kg/cd, sufficient densification will not occur and the density ratio will not reach 90%, so temperature + 1050
℃ or more and pressure +50)cg/c- or more are required, but if the temperature exceeds +1190℃, not only the grain growth of Fe silicide particles will be significant, but also Fe silicide may be eluted from the hot press mold. So I don't like it. Moreover, if the pressure exceeds 150 kg/c-, the strength of the graphite pot press mold will reach its limit, which is not preferable.
つぎに、この発明を実施例にもとづいて具体的に説明す
る。Next, the present invention will be specifically explained based on examples.
実施例 １
平均粒径：８廂を有しＣｏ：２ａｔ％をドープしたＦ
ｅ Ｓ ｉ２粉末に、市販のβ−３ｉＣウイスカーを第
１表に示される割合に配合し、この配合原料をアセトン
とともに鉄製のポットに装入し、鉄製のボールを用いて
２時間のボールミル混合を行った。Example 1 F having an average particle size of 8 squares and doped with Co: 2 at%
e Si2 powder was blended with commercially available β-3iC whiskers in the proportions shown in Table 1, this blended raw material was charged into an iron pot with acetone, and mixed in a ball mill for 2 hours using an iron ball. went.
このようにして得られた混合原料を乾燥してアセトンを
除去したのち、たて： Ｂｏａｓ、横：３０ｍｍの開口
部を有する黒鉛製ホットプレスモールドに充填し、これ
をそのまま真空ホットプレス装置に装入し、第１表に示
される条件でホットプレスすることにより第１表に示さ
れる密度比およびＣ。After drying the mixed raw material obtained in this way to remove acetone, it was filled into a graphite hot press mold with an opening of 30 mm (vertical: Boas) and horizontal: 30 mm, and this was loaded into a vacuum hot press machine as it was. The density ratio and C shown in Table 1 are obtained by hot-pressing under the conditions shown in Table 1.
ドープＦ ｅ Ｓ ｌ ２マトリックス中β−ＳｉＣウ
イスカー含有量を有する本発明Ｆｅ珪化物熱電変換材料
１〜１０、比較Ｆｅ珪化物熱電変換材料１〜５および従
来Ｆｅ珪化物熱電変換材料１を作製した。Present invention Fe silicide thermoelectric conversion materials 1 to 10, comparative Fe silicide thermoelectric conversion materials 1 to 5, and conventional Fe silicide thermoelectric conversion material 1 having a β-SiC whisker content in the doped Fe S l 2 matrix were prepared. .
このようにして得られたＦｅ珪化物熱電変換材料をそれ
ぞれ切断して、たて＝５龍、横＝５■、長さ＋３０ｍｍ
の寸法を有する試験片を２本づつ作り、第１の試験片の
一端を８００℃に加熱して両端の熱起電力を測定し、つ
いで同じ試験片でＪＩＳ規格Ｒ１６０１に規定する曲げ
強さ試験を行って３点曲げ強さを測定し、それらの測定
結果を第１表に示した。The Fe silicide thermoelectric conversion material obtained in this way was cut into pieces with length = 5 dragons, width = 5 cm, and length + 30 mm.
Two test pieces each having the dimensions were made, one end of the first test piece was heated to 800°C, the thermoelectromotive force at both ends was measured, and then the same test piece was subjected to a bending strength test specified in JIS standard R1601. The three-point bending strength was measured, and the measurement results are shown in Table 1.
さらに、第２の試験片の全体を温度：８００℃に加熱し
、加熱した状態から水中に投入し、破壊に至るまでの投
入回数を測定し、その結果も第１表に示した。Further, the entire second test piece was heated to a temperature of 800° C. and placed in water in the heated state, and the number of times it was placed until it broke was measured. The results are also shown in Table 1.
実施例 ２
平均粒径：８趨のＣｒ＋２ａｔ％をドープしたＦｅＳｉ
２粉末に、市販のβ−ＳｉＣウイスカーを２１００℃で
熱処理して得られたα−３ｉＣウイスカーを第２表に示
される割合で配合し、この配合原料をアセトンとともに
鉄製のポットに装入し、鉄製のボールを用いて２時間の
ボールミル混合を行った。Example 2 Average grain size: FeSi doped with 8 Cr+2 at%
2 powder, α-3iC whiskers obtained by heat-treating commercially available β-SiC whiskers at 2100 ° C. were blended in the proportions shown in Table 2, and this blended raw material was charged into an iron pot together with acetone. Ball mill mixing was performed for 2 hours using an iron ball.
このようにして得られた混合原料を乾燥してアセトンを
除去したのち、たて＋ ３０ｍ１．横： ３０ｍｍの開
口部を有する黒鉛製ホットプレスモールドに充填し、こ
れをそのまま真空ホットプレス装置に装入し、第１表に
示される条件でホットプレスすることにより第１表に示
される密度比およびＣｒドープＦｅ５１２マトリツクス
中α−３ｉＣウイスカー含有量を有する本発明Ｆｅ珪化
物熱電変換材料１１〜２０、比較Ｆｅ珪化物熱電変換材
料６〜１０および従来Ｆｅ珪化物熱電変換材料２を作製
した。After drying the mixed raw material obtained in this way to remove acetone, it was heated to 30ml. Horizontal: Fill a graphite hot press mold with an opening of 30 mm, load this as it is into a vacuum hot press machine, and hot press under the conditions shown in Table 1 to achieve the density ratio shown in Table 1. Invention Fe silicide thermoelectric conversion materials 11 to 20, comparative Fe silicide thermoelectric conversion materials 6 to 10, and conventional Fe silicide thermoelectric conversion material 2 having α-3iC whisker content in a Cr-doped Fe512 matrix were prepared.
このようにして得られたＦｅ珪化物熱電変換材料をそれ
ぞれ切断して、たて：５市、横＝５１、長さ：３０龍の
寸法を有する試験片を２本づつ作り、実施例１と全く同
様にして熱起電力、３点曲げ強さおよび破壊に至るまで
の投入回数を測定し、その結果を第２表に示した。The thus obtained Fe silicide thermoelectric conversion material was cut into two test pieces each having dimensions of 5 cm (vertical), 51 cm (width), and 30 cm (length). The thermoelectromotive force, three-point bending strength, and the number of injections until failure were measured in exactly the same manner, and the results are shown in Table 2.
第１表および第２表の結果から、本発明Ｆｅ珪化物熱電
変換材料１〜２０は、従来Ｆｅ珪化物熱電変換材料１〜
２に比べていずれも熱起電力については遜色なく、３点
曲げ強さおよび破壊に至るまでの回数が大幅に向上して
いることがわかる。またこの発明の条件を外れた比較Ｆ
ｅ珪化物熱電変換材料１〜１０は、熱起電力、３点曲げ
強さおよび破壊に至るまでの投入回数のうちいずれかが
極めて劣っていることがわかる。From the results in Tables 1 and 2, it can be seen that the Fe silicide thermoelectric conversion materials 1 to 20 of the present invention are different from the conventional Fe silicide thermoelectric conversion materials 1 to 20.
It can be seen that the thermoelectromotive force of both samples is comparable to that of Sample No. 2, and the three-point bending strength and the number of times it takes to break are significantly improved. Also, a comparison F that deviates from the conditions of this invention
It can be seen that e-silicide thermoelectric conversion materials 1 to 10 are extremely poor in any one of thermoelectromotive force, three-point bending strength, and number of times of injection until breaking.
上述のように、この発明のＳｉＣ繊維強化Ｆｅ珪化物熱
電変換材料は、取付けに際して破損することがなく、特
に外力が加わるような苛酷な条件での使用に十分耐える
ことができるという優れた効果を奏するものである。As mentioned above, the SiC fiber-reinforced Fe silicide thermoelectric conversion material of the present invention has the excellent effect of not being damaged during installation and being able to withstand use under harsh conditions, especially when external forces are applied. It is something to play.
Claims (7)
Ｃと記す）の短繊維またはウィスカーを分散してなるこ
とを特徴とするＳｉＣ繊維強化Ｆｅ珪化物熱電変換材料
。(1) Silicon carbide (hereinafter referred to as Si) in the Fe silicide matrix
1. A SiC fiber-reinforced Fe silicide thermoelectric conversion material, characterized in that it is made by dispersing short fibers or whiskers of (denoted as C).
化物と同じ極性であることを特徴とする請求項１記載の
ＳｉＣ繊維強化Ｆｅ珪化物熱電変換材料。(2) The SiC fiber-reinforced Fe silicide thermoelectric conversion material according to claim 1, wherein the SiC short fibers or whiskers have the same polarity as the Fe silicide.
化物マトリックス中に５〜５０容量％含有されているこ
とを特徴とする請求項１または２記載のＳｉＣ繊維強化
Ｆｅ珪化物熱電変換材料。(3) The SiC fiber-reinforced Fe silicide thermoelectric conversion material according to claim 1 or 2, wherein the SiC short fibers or whiskers are contained in the Fe silicide matrix in an amount of 5 to 50% by volume.
化物マトリックス中に配向して分散していることを特徴
とする請求項１、２または３記載のＳｉＣ繊維強化Ｆｅ
珪化物熱電変換材料。(4) The SiC fiber-reinforced Fe according to claim 1, 2 or 3, wherein the SiC short fibers or whiskers are oriented and dispersed in the Fe silicide matrix.
Silicide thermoelectric conversion material.
繊維またはウィスカーを分散してなることを特徴とする
請求項２、３または４記載のＳｉＣ繊維強化Ｆｅ珪化物
熱電変換材料。(5) The SiC fiber reinforced Fe silicide thermoelectric conversion material according to claim 2, 3 or 4, characterized in that α-SiC short fibers or whiskers are dispersed in a p-type Fe silicide matrix.
繊維またはウィスカーを分散してなることを特徴とする
請求項２、３または４記載のＳｉＣ繊維強化Ｆｅ珪化物
熱電変換材料。(6) The SiC fiber-reinforced Fe silicide thermoelectric conversion material according to claim 2, 3 or 4, characterized in that β-SiC short fibers or whiskers are dispersed in an n-type Fe silicide matrix.
スカーの混合体を、真空雰囲気中、 温度：１０５０〜１１９０℃、 圧力：５０〜２５０ｋｇ／ｃｍ＾２、 の範囲内の条件でホットプレスすることを特徴とするＳ
ｉＣ繊維強化Ｆｅ珪化物熱電変換材料の製造法。(7) Hot pressing a mixture of Fe silicide powder and SiC short fibers or whiskers in a vacuum atmosphere under the following conditions: temperature: 1050 to 1190°C, pressure: 50 to 250 kg/cm^2. S characterized by
A method for producing an iC fiber-reinforced Fe silicide thermoelectric conversion material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2176870A JPH0464265A (en) | 1990-07-04 | 1990-07-04 | Thermoelectric conversion material of sic fiber reinforced fe silicide and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2176870A JPH0464265A (en) | 1990-07-04 | 1990-07-04 | Thermoelectric conversion material of sic fiber reinforced fe silicide and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0464265A true JPH0464265A (en) | 1992-02-28 |
Family
ID=16021237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2176870A Pending JPH0464265A (en) | 1990-07-04 | 1990-07-04 | Thermoelectric conversion material of sic fiber reinforced fe silicide and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0464265A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012169595A (en) * | 2011-01-12 | 2012-09-06 | Emitec Ges Fuer Emissionstechnologie Mbh | Thermoelectric material and method for producing the same |
-
1990
- 1990-07-04 JP JP2176870A patent/JPH0464265A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012169595A (en) * | 2011-01-12 | 2012-09-06 | Emitec Ges Fuer Emissionstechnologie Mbh | Thermoelectric material and method for producing the same |
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