JP3508991B2 - Method and apparatus for testing thermal fatigue resistance of sintered ceramics - Google Patents
Method and apparatus for testing thermal fatigue resistance of sintered ceramicsInfo
- Publication number
- JP3508991B2 JP3508991B2 JP26382598A JP26382598A JP3508991B2 JP 3508991 B2 JP3508991 B2 JP 3508991B2 JP 26382598 A JP26382598 A JP 26382598A JP 26382598 A JP26382598 A JP 26382598A JP 3508991 B2 JP3508991 B2 JP 3508991B2
- Authority
- JP
- Japan
- Prior art keywords
- test piece
- sheet
- heating
- sintered body
- thermal
- 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 - Fee Related
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、セラミックス焼結
体に加熱、冷却による熱応力と熱歪みを与えた際の熱応
力と熱歪みに対するセラミックス焼結体の耐熱疲労性を
テストする方法及びその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for testing the thermal fatigue resistance of a ceramic sintered body against thermal stress and thermal strain when the ceramic sintered body is subjected to thermal stress and thermal strain due to heating and cooling. Regarding the device.
【０００２】[0002]
【従来の技術】従来、セラミックス焼結体の耐熱疲労性
テストは、例えば特開昭６０−２４９０３５号、特開平
７−２００３１号、特開平９−１８９６５１号公報等で
公知にされている。これらは特殊な試験片を流動床を用
いて急熱急冷するもの、あるいは特殊な中空試験片を用
いて高周波加熱と中空試験片の中に水を通して急冷する
もの、又は熱膨張係数の異なる材質からなる拘束治具で
両端を拘束して加熱冷却による熱膨張差で熱応力を強制
負荷するもの等である。2. Description of the Related Art Conventionally, the thermal fatigue resistance test of ceramics sintered bodies has been publicly known, for example, in Japanese Patent Laid-Open Nos. 60-249035, 7-20031, 9-189651. These are special test pieces that are rapidly heated and quenched using a fluidized bed, high-frequency heating that uses a special hollow test piece and water that is rapidly cooled in the hollow test piece, or materials with different thermal expansion coefficients. The constraint jigs are used to constrain both ends and forcibly apply thermal stress due to the difference in thermal expansion due to heating and cooling.
【０００３】[0003]
【発明が解決しようとする課題】しかし上記のようなセ
ラミックス焼結体の耐熱疲労性テストは、試験機器およ
び操作が大掛かりで特殊な試験片を準備する必要があっ
た。また熱応力および熱歪みの状態が複雑となり、定量
的な熱疲労性（熱疲労寿命）の評価が難しいという問題
があり、より簡便で精度の高いテストができる方法及び
装置の出現が業界から要請されていた。本発明は上記の
問題に鑑みて成されたもので、繰り返し加熱、冷却を受
けるセラミックス焼結体の耐熱疲労性テストについて熱
疲労の経時変化が計測できる等高精度の測定結果を得る
ことができると共に計測操作が簡便になるセラミックス
焼結体の耐熱疲労性テスト方法及びその装置を提供する
ことを目的とする。However, in the heat fatigue resistance test of the ceramics sintered body as described above, it is necessary to prepare a special test piece due to a large amount of test equipment and operation. There is also a problem that the state of thermal stress and thermal strain becomes complicated and it is difficult to quantitatively evaluate the thermal fatigue property (thermal fatigue life), and the industry demands the appearance of a method and device that can perform simpler and more accurate tests. It had been. The present invention has been made in view of the above problems, and it is possible to obtain highly accurate measurement results such as the change over time of thermal fatigue can be measured in a thermal fatigue resistance test of a ceramics sintered body that is repeatedly heated and cooled. At the same time, it is an object of the present invention to provide a thermal fatigue resistance test method for a ceramics sintered body and an apparatus for the same, which facilitates the measurement operation.
【０００４】[0004]
【課題を解決するための手段】上記の目的を達成するた
めに本発明におけるセラミックス焼結体の耐熱疲労性テ
スト方法は、一方の面に導電性薄膜を密着させた直方体
状のセラミックス焼結体試験片を、支持部材を介して支
持すると共に該試験片の他方の面を、背後に押圧部材を
当接させて支持されたシート状発熱素子に圧着させる工
程と、予め設定された低電圧および高電流の条件で電力
をフィードバック制御の下にシート状発熱素子に電力供
給をしてその発熱量を制御しながら加熱する熱衝撃操作
を６０秒間供給、６０秒間停止の間歇操作を行いかつそ
の加熱温度を上限６００℃、下限１５０℃にすることに
よって前記シート状発熱素子を間欠的に加熱、冷却して
該試験片の変形により前記押圧部材に加わる荷重を計測
すると共に該試験片の亀裂発生による前記導電性薄膜の
導通性を計測する工程と、から成ることを特徴とするセ
ラミックス焼結体の耐熱疲労性テスト方法。In order to achieve the above object, the method for testing the thermal fatigue resistance of a ceramics sintered body according to the present invention is a rectangular parallelepiped ceramics sintered body having a conductive thin film adhered to one surface thereof. A step of supporting the test piece through a supporting member and pressing the other surface of the test piece to the sheet-shaped heating element supported by abutting a pressing member on the back, and a preset low voltage and Power under high current conditions
Power is supplied to the sheet heating element under feedback control.
Thermal shock operation that heats while feeding and controlling the amount of heat generation
Supply for 60 seconds, perform intermittent operation for 60 seconds while stopping
The heating temperature of the upper limit of 600 ℃, the lower limit of 150 ℃
Therefore, the step of intermittently heating and cooling the sheet-shaped heating element to measure the load applied to the pressing member due to the deformation of the test piece and to measure the conductivity of the conductive thin film due to the occurrence of cracks in the test piece, A method for testing the thermal fatigue resistance of a ceramics sintered body, comprising:
【０００５】また、本発明におけるセラミックス焼結体
の耐熱疲労性テスト装置、昇降機を介して昇降可能に設
けた支持テーブルの上部に、その上部中央に凹部を有す
る支持台を設け、該支持台における凹部の左右外側上部
に支持部材を上方に突出させて設けると共に該支持部材
の外側に導通チェック器に接続する導通電極を設け、前
記支持台の上方に、荷重計測器に接続して固定配置され
たロードセルに連結された取付板を配置すると共に該取
付板の下部に前記凹部に対応する押圧部材を設け、該押
圧部材の下部に、電力調整器に接続された電極にその両
端を接続させたシート状発熱素子を接触させて配置し
て、これにより、一方の面に導電性薄膜を密着させた直
方体状のセラミックス焼結体試験片を、前記支持部材を
介して支持すると共に試験片の他方の面を、前記シート
状発熱素子に圧着させた後、予め設定された低電圧およ
び高電流の条件で電力をフィードバック制御の下にシー
ト状発熱素子に電力供給をしてその発熱量を制御しなが
ら加熱する熱衝撃操作を６０秒間供給、６０秒間停止の
間歇操作を行いかつその加熱温度を上限６００℃、下限
１５０℃にすることによって前記シート状発熱素子を間
欠的に加熱、冷却して該試験片の変形により前記押圧部
材に加わる荷重を計測すると共に該試験片の亀裂発生に
よる前記導電性薄膜の導通性を計測することを特徴とす
る。Further, the ceramic sintered body according to the present invention
Heat fatigue tester, which can be moved up and down via an elevator.
There is a recess in the center of the upper part of the support table.
A support base is provided, and the right and left outer upper side of the recess in the support base
A support member protruding upward from the support member
Provide a continuity electrode on the outside of the
Above the support base, it is fixedly connected to the load measuring device.
The mounting plate connected to the load cell and
A pressing member corresponding to the recess is provided on the bottom of the attached plate, and the pressing member is
At the bottom of the pressure member, the electrodes connected to the power regulator
Place the sheet-shaped heating element with the connected ends in contact with each other.
This makes it possible to directly attach the conductive thin film to one surface.
A rectangular ceramic sintered body test piece is attached to the supporting member.
Support the other side of the test piece with the sheet
After applying pressure to the heat generating element,
Power under feedback control under high current and high current conditions.
Do not supply power to the heating element to control the amount of heat generated.
Supply heat shock operation to heat from 60 seconds, stop for 60 seconds
Intermittent operation and its heating temperature is upper limit 600 ℃, lower limit
The sheet-shaped heating element is placed between
The pressing part is deformed by heating and cooling intermittently.
Measures the load applied to the material and causes cracks in the test piece
And measuring the conductivity of the conductive thin film according to
It
【０００６】本発明において、セラミックス焼結体試験
片（以下単に試験片という）を直方体状にすることによ
り試験片は、一様な熱流束が形成できると共に加熱によ
る加熱面からの温度勾配が顕著になり、その結果測定値
が精確になる。また電気ヒータとしてのシート状発熱素
子を用いることにより、試験片における加熱すべき表面
を全体的かつほぼ一様に加熱することができるため測定
値が精確になる。さらに試験片の変形による力（荷重）
を検出するため慣用のロードセルを使用でき、繰り返し
急加熱により熱応力の発生変化が読み取れ、熱疲労の進
展度が精確に計測できる。加えて試験片の亀裂の発生を
導電性薄膜の導通性をチェックして容易に検出できるた
め熱疲労の進展速度が精確に評価できる。なおここでセ
ラミックス焼結体とはファインセラミックス、ガラス、
陶磁器、セメント、耐火物等をいう。In the present invention, by making a ceramics sintered body test piece (hereinafter simply referred to as a test piece) into a rectangular parallelepiped shape, a uniform heat flux can be formed and a temperature gradient from the heating surface due to heating is remarkable. As a result, the measured value becomes accurate. Further, by using the sheet-shaped heating element as the electric heater, the surface to be heated of the test piece can be heated entirely and almost uniformly, so that the measured value becomes accurate. Furthermore, the force (load) due to the deformation of the test piece
A conventional load cell can be used to detect the thermal stress, the thermal stress generation change can be read by repeated rapid heating, and the progress of thermal fatigue can be accurately measured. In addition, since the occurrence of cracks in the test piece can be easily detected by checking the conductivity of the conductive thin film, the progress rate of thermal fatigue can be accurately evaluated. The ceramics sintered body here means fine ceramics, glass,
It refers to ceramics, cement, refractories, etc.
【０００７】[0007]
【発明の実施の形態】以下本発明の実施の形態を図面に
基づいて詳しく説明する。基盤１と天井板２とを支柱
３、３により連結した架台４における基盤１には、電動
機５Ａの出力軸の回転運動をねじ機構で直線運動に変換
する電動シリンダ５が昇降機として上向きにして設けら
れている。該電動シリンダ５の作動ロッド６の上端には
支持テーブル７が固着されており、該支持テーブル７の
上部にはその上部中央に凹部８を形成した支持台９が設
けられている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. An electric cylinder 5 for converting the rotational movement of the output shaft of the electric motor 5A into a linear movement by a screw mechanism is provided on the base 1 of the base 4 in which the base 1 and the ceiling plate 2 are connected by the columns 3 and 3 as a lift. Has been. A supporting table 7 is fixed to the upper end of the operating rod 6 of the electric cylinder 5, and a supporting table 9 having a recess 8 formed at the center of the upper part of the supporting table 7 is provided.
【０００８】該支持台９における凹部８の左右外側上部
には、下面に導電性薄膜素子１０を密着させた直方体状
のセラミックス焼結体試験片Ｔ（以下単に試験片Ｔとい
う）を支持する２個の支持部材１１、１１が所定の間隔
（３０ｍｍ）をおくと共にその上面を支持台９の上面か
ら突出させた状態で設けられている。さらに支持台９に
おける支持部材１１、１１の外側には導通電極１２、１
２が支持部材１１、１１の高さレベルと同じにして取付
けられている。前記試験片Ｔは、幅７．０ｍｍ×長さ４
０ｍｍ×厚さ２０ｍｍの直方体状に成形されたファイン
セラミックス、ガラス、陶磁器、セメント、耐火物等の
下面に導電性薄膜素子１０を焼付けたものである。また
前記支持部材１１、１１は、全体が丸棒状を成し、熱伝
導率が２０〜１Ｗ／ｍＫと小さくかつ熱膨張率も１０〜
０．１×１０−６／℃と小さいセラミックス素材である
ジルコニアあるいは窒化ケイ素が使用されている。A rectangular parallelepiped ceramic sintered body test piece T (hereinafter simply referred to as a test piece T) having a conductive thin film element 10 adhered to its lower surface is supported on the upper left and right outer sides of the recess 8 of the support base 2 The individual support members 11, 11 are provided with a predetermined interval (30 mm) and the upper surface of the support members 11 and 11 protruding from the upper surface of the support base 9. Further, on the outside of the support members 11 and 11 on the support base 9, conductive electrodes 12 and 1 are provided.
2 are mounted at the same height level as the support members 11, 11. The test piece T has a width of 7.0 mm and a length of 4
The conductive thin film element 10 is baked on the lower surface of fine ceramics, glass, ceramics, cement, refractory or the like, which is molded into a rectangular parallelepiped shape of 0 mm × 20 mm in thickness. The supporting members 11, 11 are formed into a round bar shape as a whole, have a small thermal conductivity of 20 to 1 W / mK, and have a thermal expansion coefficient of 10 to 10.
Zirconia or silicon nitride, which is a small ceramic material of 0.1 × 10 −6 / ° C., is used.
【０００９】前記架台４における天井板２の下面は、荷
重（反力）検知のためのロードセル１３が固着されてお
り、該ロードセル１３には上部が前記天井板２に対し上
下動可能にして貫通された連結体１４が下方に突出され
て固着されている。該連結体１４の下端には取付板１５
を介して押圧部材１６が取付けられており、該押圧部材
１６も前記支持部材１１と同じく全体が丸棒状を成し、
熱伝導率が２０〜１Ｗ／ｍＫと小さくかつ熱膨張率も１
０〜０．１×１０−６／℃と小さいセラミックス素材で
あるジルコニアあるいは窒化ケイ素が使用されている。
また前記取付板１５の左右両側端面には通電用の電極１
７、１７が下方に突出させて固着されており、該電極１
７、１７間には上面を前記押圧部材１６に接触させたシ
ート状発熱素子１８が接続されている。なおシート状発
熱素子１８は平面状の発熱可能な導電性セラミックス素
材であって材質が窒化物、炭化物、ほう化物またはニク
ロム、ステンレス等耐熱金属素材で構成してある。A load cell 13 for detecting a load (reaction force) is fixedly attached to the lower surface of the ceiling plate 2 of the gantry 4, and the load cell 13 has an upper portion which is vertically movable with respect to the ceiling plate 2 and penetrates the load cell 13. The connected body 14 is fixed so as to protrude downward. A mounting plate 15 is provided at the lower end of the connecting body 14.
The pressing member 16 is attached through the pressing member 16, and the pressing member 16 also has a round bar shape like the supporting member 11,
Small thermal conductivity of 20 to 1 W / mK and thermal expansion coefficient of 1
Zirconia or silicon nitride, which is a small ceramic material of 0 to 0.1 × 10 −6 / ° C., is used.
Further, electrodes 1 for energization are provided on both left and right end surfaces of the mounting plate 15.
The electrodes 1 and 7 are fixed by projecting downward.
A sheet-shaped heating element 18 having an upper surface in contact with the pressing member 16 is connected between 7 and 17. The sheet-shaped heat generating element 18 is a conductive ceramic material capable of generating heat in a flat shape, and is made of a heat resistant metal material such as nitride, carbide, boride or nichrome, stainless steel.
【００１０】このように構成された装置本体部分の外側
には制御盤１９が設けられていて前記電動シリンダ５の
電動機５Ａは制御盤１９に配設されたドライバ２０に、
また前記導通電極１２，１２は制御盤１９に配設された
導通チェック器２１に、さらに前記通電用の電極１７、
１７は制御盤１９に配設された電力調整器２２を介して
図示されない電源に、また前記ロードセル１３は制御盤
１９に設けられた荷重計測器２３にそれぞれ電気的に接
続されている。A control board 19 is provided outside the main body of the apparatus constructed as described above, and the electric motor 5A of the electric cylinder 5 is mounted on a driver 20 provided on the control board 19.
Further, the conduction electrodes 12 and 12 are connected to a conduction checker 21 provided on a control panel 19, and the conduction electrodes 17 and
Reference numeral 17 is electrically connected to a power source (not shown) via an electric power regulator 22 provided on the control panel 19, and the load cell 13 is electrically connected to a load measuring instrument 23 provided on the control panel 19.
【００１１】次にこのように構成した装置を用いて前記
試験片Ｔによる耐熱疲労性テストの手順について説明す
る。図１の状態は、支持台９の支持部材１１、１１上に
導電性薄膜素子１０を下にして試験片Ｔを載置した後電
動シリンダ５の作動により支持テーブル７及び支持台９
と共に試験片Ｔが上昇され、該試験片Ｔの上面がシート
状発熱素子１８の下面に密着（試験片Ｔの上面が押圧部
材１６にシート状発熱素子１８を介して拘束された状
態）されるまで制御盤１９のドライバ２０によりコント
ロールされて上昇し、停止された状態にある。Next, the procedure of the thermal fatigue resistance test with the test piece T using the apparatus thus constructed will be described. In the state shown in FIG. 1, after the test piece T is placed on the support members 11 and 11 of the support base 9 with the conductive thin film element 10 facing downward, the support table 7 and the support base 9 are operated by the operation of the electric cylinder 5.
At the same time, the test piece T is raised, and the upper surface of the test piece T is brought into close contact with the lower surface of the sheet-shaped heat generating element 18 (the upper surface of the test piece T is restrained by the pressing member 16 via the sheet-shaped heat generating element 18). It is controlled by the driver 20 of the control panel 19 to rise, and is in a stopped state.
【００１２】この状態で電力調整器２２から予め設定さ
れた低電圧および高電流の条件で電力をフィードバック
制御の下にシート状発熱素子１８に電力供給をしてその
発熱量を制御しながら加熱する熱衝撃操作を６０秒間供
給、６０秒間停止の間歇操作を行う。これに伴い試験片
Ｔは上面だけが加熱され、熱応力が発生して変形しよう
とし、この結果ロードセル１３はその変形に対応した力
（荷重）で押圧され、その信号が荷重計測器２３に送ら
れ、反力として検知されることになる。そしてロードセ
ル１３が検知した反力は経時的に計測され、この計測結
果は図２に示すようになる。また図3は試験片Ｔの上面
温度を制御したもので加熱温度として上限６００℃、下
限１５０℃（冷却）に設定した時の実施例である。さら
に図4はその時の１サイクルでの詳細加熱冷却温度経時
変化と発生する反力（熱応力）、クラック発生有無の検
知結果である。In this state, power is fed from the power regulator 22 to the sheet-shaped heating element 18 under feedback control under preset conditions of low voltage and high current, and heating is performed while controlling the amount of heat generated. The thermal shock operation is supplied for 60 seconds, and the intermittent operation is performed for 60 seconds while stopped. Along with this, only the upper surface of the test piece T is heated, thermal stress is generated and it tends to be deformed. As a result, the load cell 13 is pressed by a force (load) corresponding to the deformation, and its signal is sent to the load measuring instrument 23. Will be detected as a reaction force. Then, the reaction force detected by the load cell 13 is measured with time, and the measurement result is as shown in FIG. FIG. 3 shows an example in which the upper surface temperature of the test piece T is controlled and the heating temperature is set to an upper limit of 600 ° C. and a lower limit of 150 ° C. (cooling). Further, FIG. 4 shows the results of detection of detailed heating / cooling temperature changes with time in one cycle, reaction force (thermal stress) generated, and presence / absence of crack occurrence.
【００１３】すなわち繰り返し熱応力が発生すると検出
される反力は小さくなり試験片Ｔの内部に熱歪みによる
亀裂が進展していることが推定される。また試験片Ｔの
導電性薄膜素子１０は最初は導通状態で検出されている
が繰り返し熱応力が発生すると亀裂が進展した時点で試
験片Ｔの導電性薄膜素子１０が断線して電気的導通がな
くなることが検出される。この検出された反力、供給電
力、経過時間、亀裂発生の有無、試験片温度等熱衝撃に
係わる計測データを用いることにより試験片Ｔの熱応力
について解析することができる。なお上記実施例では一
定時間加熱冷却を行ったが試験片Ｔの加熱面の温度を制
御して所定反力になるように加熱冷却してもよい。That is, it is estimated that the reaction force detected when the thermal stress is repeatedly generated becomes small and the crack due to the thermal strain propagates inside the test piece T. Further, the conductive thin film element 10 of the test piece T is initially detected in a conductive state, but when the thermal stress is repeatedly generated, the conductive thin film element 10 of the test piece T is broken at a time point when the crack develops, and the conductive state is maintained. It is detected that it is gone. The thermal stress of the test piece T can be analyzed by using the measured reaction data such as the reaction force, the supplied power, the elapsed time, the presence or absence of cracks, and the test piece temperature which are detected. In the above embodiment, heating and cooling were performed for a certain period of time, but the temperature of the heating surface of the test piece T may be controlled to heat and cool so as to obtain a predetermined reaction force.
【００１４】なお上記の実施の形態では試験片Ｔを支持
部材１１、１１および押圧部材１６とで予め拘束してか
らシート状発熱素子１８に通電して熱衝撃を与えている
がこれに限定することなく予めシート状発熱素子１８に
通電してシート状発熱素子１８を発熱させた後試験片Ｔ
上面に接触させて急加熱するようにしてもよい。さらに
試験片Ｔは破壊起点支持面を導電性薄膜１０側になるよ
うに３点で拘束しているがこれに限定されるものではな
く４点支持で拘束してもよい。また支持部材１１、１１
を試験片Ｔの下側にし、押圧部材１６を試験片Ｔの上側
に配置したがこの配置を１８０度回転させて上下逆にし
たり、９０度回転して試験片Ｔを立てた状態にしても同
様の作用効果が得られる。さらに上記テストは大気条件
で行ったが雰囲気を真空にすることにより対流伝熱が省
略でき、より高精度の計測が可能になる。また加熱衝撃
は加熱だけを制御し、冷却は自然放熱により行っている
が強制的に冷却をする手段を用いれば繰り返し熱サイク
ルを短くでき効率がよくなる。In the above embodiment, the test piece T is restrained in advance by the supporting members 11, 11 and the pressing member 16 and then the sheet-like heating element 18 is energized to give a thermal shock, but the present invention is not limited to this. Without heating the sheet-shaped heating element 18 by heating the sheet-shaped heating element 18 in advance.
You may make it heat rapidly by making it contact an upper surface. Further, in the test piece T, the fracture starting point supporting surface is constrained at three points so as to be on the conductive thin film 10 side, but the invention is not limited to this and may be constrained by four point supporting. Further, the support members 11, 11
Was placed on the lower side of the test piece T, and the pressing member 16 was placed on the upper side of the test piece T, but this arrangement is rotated 180 degrees upside down, or rotated 90 degrees to make the test piece T stand upright. Similar effects can be obtained. Further, the above test was conducted under atmospheric conditions, but convection heat transfer can be omitted by making the atmosphere vacuum, and more accurate measurement becomes possible. Further, the heating impact controls only the heating and the cooling is performed by natural heat dissipation, but if a means for forcibly cooling is used, the repeated thermal cycle can be shortened and the efficiency can be improved.
【００１５】[0015]
【発明の効果】本発明は、上記の説明から明らかなよう
に、一方の面に導電性薄膜を密着させた直方体状のセラ
ミックス焼結体試験片を、支持部材を介して支持すると
共に該試験片の他方の面を、背後に押圧部材を当接させ
て支持されたシート状発熱素子に圧着させる工程と、予
め設定された低電圧および高電流の条件で電力をフィー
ドバック制御の下にシート状発熱素子に電力供給をして
その発熱量を制御しながら加熱する熱衝撃操作を６０秒
間供給、６０秒間停止の間歇操作を行いかつその加熱温
度を上限６００℃、下限１５０℃にすることによって前
記シート状発熱素子を間欠的に加熱、冷却して該試験片
の変形により前記押圧部材に加わる荷重を計測すると共
に該試験片の亀裂発生による前記導電性薄膜の導通性を
計測する工程と、から成るものであるから、従来のこの
種のセラミックス焼結体の耐熱疲労性テストに比べて試
験片は一様の熱流束が形成でき、また加熱による加熱面
からの温度勾配が顕著になり、しかも電気ヒータとして
シート状発熱素子を用いることにより試験片における加
熱すべき表面を全体的かつほぼ一様に加熱することがで
き、さらに試験片の変形による力（荷重）を検出するた
め慣用のロードセルを使用でき、このため測定値が精確
になり試験片の亀裂発生を電気的導通性のチェックによ
り同時に検出するため熱疲労の進展度を精確に評価でき
る。この結果熱応力および熱歪みを受けた試験片に耐熱
疲労性について高精度の測定結果が得られる上に計測操
作が簡便になる等優れた効果がある。As is apparent from the above description, the present invention supports a rectangular parallelepiped ceramics sintered body test piece having a conductive thin film adhered to one surface thereof through a support member and performs the test. the other surface of the strip, the step of crimping the pressing member in a sheet-like heating element supported by abutting behind, pre
To supply power under the set low voltage and high current conditions.
Power is supplied to the sheet heating element under feedback control.
Heat shock operation to heat while controlling the amount of heat generated for 60 seconds
Supply for 60 seconds, intermittent operation for 60 seconds and heating temperature
The sheet-like heating element is intermittently heated and cooled by setting the upper limit to 600 ° C. and the lower limit to 150 ° C. to measure the load applied to the pressing member due to the deformation of the test piece and the test. The test piece has a uniform heat flux as compared with the conventional thermal fatigue resistance test of this type of ceramics sintered body, since it consists of the step of measuring the conductivity of the conductive thin film due to the occurrence of cracks in the piece. Can be formed, and the temperature gradient from the heating surface due to heating becomes remarkable, and moreover, the surface to be heated in the test piece can be heated almost uniformly throughout by using the sheet-shaped heating element as the electric heater. In addition, a conventional load cell can be used to detect the force (load) due to the deformation of the test piece, so that the measured value becomes accurate and the crack occurrence of the test piece can be detected at the same time by checking the electrical conductivity. The progress of the order thermal fatigue can be accurately evaluated. As a result, the test piece subjected to the thermal stress and the thermal strain has an excellent effect such that a highly accurate measurement result of the thermal fatigue resistance can be obtained and the measurement operation can be simplified.
【図１】本発明の実施の形態を示す全体構成正面図であ
る。FIG. 1 is an overall configuration front view showing an embodiment of the present invention.
【図２】セラミックス焼結体試験片の耐熱疲労性テスト
についての経時的測定結果を示すグラフである。FIG. 2 is a graph showing a result of time-dependent measurement of a thermal fatigue resistance test of a ceramics sintered body test piece.
【図3】セラミックス焼結体試験片の上面温度を制御し
た熱疲労試験についての経時的測定結果を示すグラフで
ある。FIG. 3 is a graph showing a time-dependent measurement result of a thermal fatigue test in which an upper surface temperature of a ceramics sintered body test piece is controlled.
【図4】セラミックス焼結体試験片の熱疲労試験サイク
ルデータを示すグラフである。FIG. 4 is a graph showing thermal fatigue test cycle data of a ceramics sintered body test piece.
５ 電動シリンダ ５Ａ 電動機 ７ 支持テーブル ８ 凹部 ９ 支持台 １０ 導電性薄膜 １１ 支持部材 １２ 導通電極 １３ ロードセル １６ 押圧部材 １７ 電極 １８ シート状発熱素子 ２０ ドライバ ２１ 導通チェック器 ２２ 電力調整器 ２３ 荷重計測器 Ｔ セラミックス焼結体試験片 5 electric cylinder 5A electric motor 7 Support table 8 recess 9 Support stand 10 Conductive thin film 11 Support member 12 Conductive electrode 13 load cell 16 Pressing member 17 electrodes 18 Sheet heating element 20 drivers 21 Continuity checker 22 Power regulator 23 load measuring instrument T Ceramics sintered body test piece
フロントページの続き (56)参考文献 特開 平７−20031（ＪＰ，Ａ) 特開 平７−12773（ＪＰ，Ａ) 特開 平５−66186（ＪＰ，Ａ) 特開 平３−152441（ＪＰ，Ａ) 特開 平11−218480（ＪＰ，Ａ) 水谷安伸、内村勝次、高津学，セラミ ックスの耐熱衝撃性試験装置の開発，第 47期学術講演会講演論文集，日本，日本 材料学会，1998年 ５月15日，ｐ．321 −322 (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 3/00 - 3/62 ＪＩＣＳＴファイル（ＪＯＩＳ)Continuation of the front page (56) Reference JP-A-7-20031 (JP, A) JP-A-7-12773 (JP, A) JP-A-5-66186 (JP, A) JP-A-3-152441 (JP , A) JP-A-11-218480 (JP, A) Yasunobu Mizutani, Katsuji Uchimura, Manabu Takatsu, Development of Thermal Shock Resistance Tester for Ceramics, Proc. 47th Annual Conference, Japan, The Society of Materials Science, Japan , May 15, 1998, p. 321-322 (58) Fields investigated (Int.Cl. 7 , DB name) G01N 3/00-3/62 JISST file (JOIS)
Claims (2)
体状のセラミックス焼結体試験片を、支持部材を介して
支持すると共に該試験片の他方の面を、背後に押圧部材
を当接させて支持されたシート状発熱素子に圧着させる
工程と、予め設定された低電圧および高電流の条件で電
力をフィードバック制御の下にシート状発熱素子に電力
供給をしてその発熱量を制御しながら加熱する熱衝撃操
作を６０秒間供給、６０秒間停止の間歇操作を行いかつ
その加熱温度を上限６００℃、下限１５０℃にすること
によって前記シート状発熱素子を間欠的に加熱、冷却し
て該試験片の変形により前記押圧部材に加わる荷重を計
測すると共に該試験片の亀裂発生による前記導電性薄膜
の導通性を計測する工程と、から成ることを特徴とする
セラミックス焼結体の耐熱疲労性テスト方法。1. A rectangular parallelepiped ceramic sintered body test piece having a conductive thin film adhered to one surface thereof is supported by a supporting member, and the other surface of the test piece is attached to a pressing member on the back side. The process of pressing the sheet-shaped heating element that is in contact with and supported by pressure, and the power is applied under the preset low voltage and high current conditions.
Power is fed to the sheet heating element under feedback control.
Thermal shock operation that supplies and heats while controlling the calorific value
Supply the work for 60 seconds, perform the intermittent operation for 60 seconds and
Set the heating temperature to 600 ° C as the upper limit and 150 ° C as the lower limit.
A step of measuring the conductivity of the conductive thin film by cracking of the test piece with the sheet-like heating element intermittently heated, to measure the load applied to the pressing member by the deformation of the cooling to the test piece by A method for testing the thermal fatigue resistance of a ceramics sintered body, comprising:
ブル７の上部に、その上部中央に凹部８を有する支持台
９を設け、該支持台９における凹部８の左右外側上部に
支持部材１１、１１を上方に突出させて設けると共に該
支持部材１１、１１の外側に導通チェック器２１に接続
する導通電極１２、１２を設け、前記支持台９の上方
に、荷重計測器２３に接続して固定配置されたロードセ
ル１３に連結された取付板１５を配置すると共に該取付
板１５の下部に前記凹部８に対応する押圧部材１６を設
け、該押圧部材１６の下部に、電力調整器２２に接続さ
れた電極１７、１７にその両端を接続させたシート状発
熱素子１８を接触させて配設して、 これにより、一方の面に導電性薄膜を密着させた直方体
状のセラミックス焼結体試験片を、前記支持部材を介し
て支持すると共に試験片の他方の面を、前記シート状発
熱素子に圧着させた後、予め設定された低電圧および高
電流の条件で電力をフィードバック制御の下にシート状
発熱素子に電力供給をしてその発熱量を制御しながら加
熱する熱衝撃操作を６０秒間供給、６０秒間停止の間歇
操作を行いかつその加熱温度を上限６００℃、下限１５
０℃にすることによって前記シート状発熱素子１８を間
欠的に加熱、冷却して該試験片の変形により前記押圧部
材１６に加わる荷重を計測すると共に該試験片の亀裂発
生による前記導電性薄膜の導通性を計測することを特徴
とするセラミックス焼結体の耐熱疲労性テスト装置 。2. A support table provided so as to be able to move up and down via an elevator.
A support base having a concave portion 8 at the center of the upper portion of the bull 7.
9 are provided on the upper left and right outer sides of the recess 8 in the support base 9.
The support members 11, 11 are provided so as to project upward, and
Connected to the continuity checker 21 on the outside of the support members 11, 11.
The conductive electrodes 12 and 12 are provided above the support base 9.
The load sensor fixedly connected to the load measuring device 23.
The mounting plate 15 connected to the ruler 13 is arranged and
A pressing member 16 corresponding to the recess 8 is provided at the bottom of the plate 15.
The power regulator 22 is connected to the bottom of the pressing member 16.
Sheet-like electrode with both ends connected to the separated electrodes 17,
A rectangular parallelepiped in which the thermal element 18 is disposed in contact with each other, and a conductive thin film is adhered to one surface of the rectangular parallelepiped.
-Shaped ceramics sintered body test piece through the support member
Support the other side of the test piece, and
After crimping to the thermal element, the preset low voltage and high
Sheet-like power under feedback control under current condition
Power is supplied to the heating element to control the heating value.
Supply heat shock operation for 60 seconds, pause for 60 seconds
Operation is performed and the heating temperature is set to an upper limit of 600 ° C. and a lower limit of 15
The temperature of the sheet-shaped heating element 18 is kept between 0 ° C.
The pressing part is deformed by heating and cooling intermittently.
The load applied to the material 16 is measured and cracks are generated in the test piece.
Characterized by measuring the conductivity of the conductive thin film
Heat resistance fatigue test equipment for ceramics sintered body .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26382598A JP3508991B2 (en) | 1998-09-18 | 1998-09-18 | Method and apparatus for testing thermal fatigue resistance of sintered ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26382598A JP3508991B2 (en) | 1998-09-18 | 1998-09-18 | Method and apparatus for testing thermal fatigue resistance of sintered ceramics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000097834A JP2000097834A (en) | 2000-04-07 |
| JP3508991B2 true JP3508991B2 (en) | 2004-03-22 |
Family
ID=17394758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26382598A Expired - Fee Related JP3508991B2 (en) | 1998-09-18 | 1998-09-18 | Method and apparatus for testing thermal fatigue resistance of sintered ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3508991B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651639A (en) * | 2016-03-24 | 2016-06-08 | 中国北方发动机研究所(天津) | Inverted type piston thermal fatigue testing device |
| CN110095364A (en) * | 2019-04-26 | 2019-08-06 | 哈尔滨工业大学 | A kind of high temperature heat seal high-temperature behavior Thermal-mechanical Coupling test platform |
| KR102267228B1 (en) * | 2020-11-23 | 2021-06-21 | 주식회사 지노테크 | High temperature durability tester |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4930713B2 (en) * | 2007-06-12 | 2012-05-16 | 株式会社Ｉｈｉ | Thermal cycle test apparatus and thermal cycle test method |
| CN103528883A (en) * | 2013-10-16 | 2014-01-22 | 长安大学 | Cam quantitative repeated loading device |
| CN104792632B (en) * | 2015-03-26 | 2017-10-17 | 北京理工大学 | A kind of cylinder head simulating piece fatigue test method |
-
1998
- 1998-09-18 JP JP26382598A patent/JP3508991B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 水谷安伸、内村勝次、高津学，セラミックスの耐熱衝撃性試験装置の開発，第４７期学術講演会講演論文集，日本，日本材料学会，１９９８年 ５月１５日，ｐ．３２１−３２２ |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651639A (en) * | 2016-03-24 | 2016-06-08 | 中国北方发动机研究所(天津) | Inverted type piston thermal fatigue testing device |
| CN105651639B (en) * | 2016-03-24 | 2018-06-12 | 中国北方发动机研究所(天津) | A kind of inversion type Piston Thermal Fatigue Test device |
| CN110095364A (en) * | 2019-04-26 | 2019-08-06 | 哈尔滨工业大学 | A kind of high temperature heat seal high-temperature behavior Thermal-mechanical Coupling test platform |
| KR102267228B1 (en) * | 2020-11-23 | 2021-06-21 | 주식회사 지노테크 | High temperature durability tester |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000097834A (en) | 2000-04-07 |
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