JPH0639324Y2 - Pressure rod of jig for measuring high temperature mechanical properties - Google Patents
Pressure rod of jig for measuring high temperature mechanical propertiesInfo
- Publication number
- JPH0639324Y2 JPH0639324Y2 JP8668387U JP8668387U JPH0639324Y2 JP H0639324 Y2 JPH0639324 Y2 JP H0639324Y2 JP 8668387 U JP8668387 U JP 8668387U JP 8668387 U JP8668387 U JP 8668387U JP H0639324 Y2 JPH0639324 Y2 JP H0639324Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure rod
- jig
- rod
- mechanical properties
- temperature mechanical
- 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
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、高温機械的特性測定用治具、たとえばJIS R
1601に規定された該治具の加圧ロッドに関するものであ
る。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a jig for measuring high-temperature mechanical properties, for example, JIS R.
The present invention relates to a pressure rod of the jig specified in 1601.
従来からセラミックスなどの強度，クリープ特性などの
高温機械的特性を測定するための治具としては、アルミ
ナ系の耐火物や、炭化ケイ素などが使用されている。こ
れらの測定には、強度試験機に高温炉がセットされ、炉
の外部から炉内に治具を保持し、また、加圧のための柱
状のロッドが必要となる。このロッドは、ロッドの両端
に急激な温度勾配が生じており、常に熱応力を受けてい
る。このロッドにアルミナを使用した場合、この熱応力
とクリープに耐えるためには、多孔質アルミナ耐火物を
用いて、さらに圧力を受ける面の面積も十分に大きくす
る必要がある。一方炭化ケイ素のロッドの場合、高温で
の耐クリープ特性および熱応力に対する強度は、実用上
問題がないが、中実のロッドのため、外部への熱のロス
が大きく昇温に時間がかかる。さらに炭化物であるため
に高温での表面酸化の問題もある。Conventionally, alumina-based refractories, silicon carbide, etc. have been used as jigs for measuring high-temperature mechanical properties such as strength and creep properties of ceramics. For these measurements, a high-temperature furnace is set in a strength tester, a jig is held inside the furnace from the outside of the furnace, and a columnar rod for pressurization is required. This rod has a rapid temperature gradient at both ends of the rod and is constantly subjected to thermal stress. When alumina is used for this rod, in order to withstand this thermal stress and creep, it is necessary to use a porous alumina refractory and further increase the area of the pressure receiving surface. On the other hand, in the case of a silicon carbide rod, the creep resistance property at high temperature and the strength against thermal stress have no practical problems, but since it is a solid rod, the loss of heat to the outside is large and it takes time to raise the temperature. Further, since it is a carbide, there is a problem of surface oxidation at high temperature.
図１は、高温機械的特性を測定するための治具及び装置
の一例の全体図である。ここに示された上下の加圧ロッ
ド２および３は、ロッドの一端が炉内の最高温度部にあ
り、もう一方の端は水冷部にあるため前述のとおり、急
激な温度勾配にさらされており、常に破壊危険性があ
る。FIG. 1 is an overall view of an example of a jig and an apparatus for measuring high temperature mechanical characteristics. The upper and lower pressurizing rods 2 and 3 shown here are exposed to a sudden temperature gradient as described above because one end of the rod is at the highest temperature part in the furnace and the other end is at the water cooling part. There is always a risk of destruction.
本考案者らは、かかる問題点を解決するために、新しい
構造の加圧ロッドを考案した。本考案は、柱状中空セラ
ミックス焼結体からなる、高温機械特性測定用治具の加
圧ロッドを要旨とする。中空であるために熱応力の発生
が最少限におさえられ、また熱の伝導面積も小さい。図
２および３にその代表的な例を示す。下部のロッドは、
円筒状のパイプからなる下部加圧ロッド本体21と、その
上下に円板状のフタ22と23を有する。この円板状のフタ
には、各々治具を固定する凸部と冷却部に固定する凸部
を有している。この凸部は必ずしも必要とされるもので
はないが、何らかの固定のための構造を有しているほう
が好ましい。また、上部ロッドも、円筒状のパイプから
なる上部加圧ロッド本体11と上部水冷加圧ロッド12を有
し、上部加圧ロッド本体11は下端が閉じられており、上
端にフランジを有し、上部水冷加圧ロッド12に固定され
ている。この様な構造をとることによって、温度こう配
による熱応力の影響を最小限にすることができる。この
加圧ロッドに用いられるセラミックスとしては、ムライ
ト，炭化ケイ素，窒化ケイ素，アルミナ等が考えられ
る。The present inventors have devised a pressure rod having a new structure in order to solve such a problem. The gist of the present invention is a pressure rod of a jig for measuring high-temperature mechanical properties, which is made of a columnar hollow ceramics sintered body. Since it is hollow, the generation of thermal stress is minimized, and the heat conduction area is small. 2 and 3 show a typical example. The lower rod is
A lower pressure rod body (21) made of a cylindrical pipe, and disc-shaped lids (22) and (23) above and below it are provided. Each of the disc-shaped lids has a protrusion for fixing the jig and a protrusion for fixing to the cooling unit. This convex portion is not always required, but it is preferable that the convex portion has some kind of fixing structure. Further, the upper rod also has an upper pressure rod main body 11 and an upper water-cooled pressure rod 12 made of a cylindrical pipe, the upper pressure rod main body 11 is closed at the lower end, and has a flange at the upper end, It is fixed to the upper water-cooled pressure rod 12. By adopting such a structure, the influence of thermal stress due to the temperature gradient can be minimized. Mullite, silicon carbide, silicon nitride, alumina, etc. can be considered as the ceramics used for this pressure rod.
加圧ロッドをこの様な中空構造にすることにより破壊の
可能性を減少することができる。また、ロッドの断面積
が小さくなるために、ロッドを伝って失なわれる熱量が
減少するために、温度の上昇速度が速くなる。The hollow structure of the pressure rod can reduce the possibility of breakage. In addition, since the cross-sectional area of the rod is reduced, the amount of heat lost through the rod is reduced, and the rate of temperature rise is increased.
図１は、従来の高温機械的特性測定用治具の１例の全体
図である。図２は本考案の１例の高温機械的特性測定用
治具における上部加圧ロッドの垂直断面図であり、図３
は本考案の１例の高温機械的特性測定用治具における下
部加圧ロッドの垂直断面図であり、それぞれ上記図１の
従来の高温機械的特性測定用治具における上部加圧ロッ
ドおよび下部加圧ロッドの本考案による改良例の図であ
る。図中の符号の意味は、つぎのとおりである。 1:電気炉 ２、11:上部加圧ロッド本体 ３、21:下部加圧ロッド本体 ４、22:（下部加圧ロッドの上の）フタ ５、23:（下部加圧ロッドの下の）フタ ６、24:高温機械的特性測定用治具本体 ７、12:上部水冷加圧ロッド ８、25:下部水冷加圧ロッド 9:試験機ステージ 13:上部加圧ロッド固定用ロッド 26:断熱材FIG. 1 is an overall view of an example of a conventional jig for measuring high-temperature mechanical properties. FIG. 2 is a vertical cross-sectional view of the upper pressure rod of the jig for measuring high-temperature mechanical properties of one example of the present invention.
1 is a vertical sectional view of a lower pressing rod in a jig for measuring high-temperature mechanical characteristics according to an example of the present invention. FIG. FIG. 7 is a view showing an improved example of the pressure rod according to the present invention. The symbols in the figure have the following meanings. 1: Electric furnace 2, 11: Upper pressure rod body 3, 21: Lower pressure rod body 4, 22: Lid (above the lower pressure rod) 5, 23: Lid (below the lower pressure rod) 6, 24: Jig body for high temperature mechanical property measurement 7, 12: Upper water-cooled pressure rod 8, 25: Lower water-cooled pressure rod 9: Testing machine stage 13: Upper pressure rod fixing rod 26: Insulation material
Claims (1)
温機械特性測定用治具の加圧ロッド。1. A pressure rod of a jig for measuring high-temperature mechanical properties, which comprises a columnar hollow ceramics sintered body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8668387U JPH0639324Y2 (en) | 1987-06-05 | 1987-06-05 | Pressure rod of jig for measuring high temperature mechanical properties |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8668387U JPH0639324Y2 (en) | 1987-06-05 | 1987-06-05 | Pressure rod of jig for measuring high temperature mechanical properties |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6433650U JPS6433650U (en) | 1989-03-02 |
| JPH0639324Y2 true JPH0639324Y2 (en) | 1994-10-12 |
Family
ID=31311321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8668387U Expired - Lifetime JPH0639324Y2 (en) | 1987-06-05 | 1987-06-05 | Pressure rod of jig for measuring high temperature mechanical properties |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639324Y2 (en) |
-
1987
- 1987-06-05 JP JP8668387U patent/JPH0639324Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6433650U (en) | 1989-03-02 |
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