JPS57163856A - Measuring method for thermal diffusivity of material - Google Patents
Measuring method for thermal diffusivity of materialInfo
- Publication number
- JPS57163856A JPS57163856A JP18334581A JP18334581A JPS57163856A JP S57163856 A JPS57163856 A JP S57163856A JP 18334581 A JP18334581 A JP 18334581A JP 18334581 A JP18334581 A JP 18334581A JP S57163856 A JPS57163856 A JP S57163856A
- Authority
- JP
- Japan
- Prior art keywords
- test bar
- radius
- time
- thermal diffusivity
- arc
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
PURPOSE:To decide on the thermal diffusivity of a heat-resisting material easily and rationally by heating the center part of a discoid test bar by arc discharge, and then measuring a time when a thermocouple buried in the external circumferential area of a disk starts rising in temperature. CONSTITUTION:A gap adjustment bar 7 flexes a beltlike plate 5, whose elasticity holds a precribed interval between an electrode 2 for arc heat generation and a discoid test bar 1 having a radius (b) enough for flight. Then, the output of an arc generator 13 is applied between the electrode 2 and test bar 1 through high power source conductors 9 and 10 for discharge, thereby heating the area of the test bar 1 having a center-part radius (a) rapidly. The outputs of thermocouples 17 and 17' buried at the same radius position (r) with the test bar 1 are supplied to an electromagnetic oscillograph 20 to record temperature rise starting time t0 at the position, so that thermal diffusivity (k) is determined from k=b<2>. tau/t0 by using a characteristic dimensionless time tau determined for a center part heat radius a/b and a thermocouple temperature measurement position r/b, and the time t0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18334581A JPS57163856A (en) | 1981-11-16 | 1981-11-16 | Measuring method for thermal diffusivity of material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18334581A JPS57163856A (en) | 1981-11-16 | 1981-11-16 | Measuring method for thermal diffusivity of material |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6334374A Division JPS5738858B2 (en) | 1974-06-06 | 1974-06-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57163856A true JPS57163856A (en) | 1982-10-08 |
| JPS6143658B2 JPS6143658B2 (en) | 1986-09-29 |
Family
ID=16134098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18334581A Granted JPS57163856A (en) | 1981-11-16 | 1981-11-16 | Measuring method for thermal diffusivity of material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57163856A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6110751A (en) * | 1984-06-26 | 1986-01-18 | Ichiro Hatta | Measurement for diffusivity of heat by intermittent heating |
| JPS61213759A (en) * | 1985-03-20 | 1986-09-22 | Shinku Riko Kk | Thermal diffusivity measuring device |
| US4933887A (en) * | 1985-05-10 | 1990-06-12 | Budapesti Muszaki Egyetem | Process and apparatus for the determination of thermo-physical properties |
| JP2017527813A (en) * | 2014-09-10 | 2017-09-21 | フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン | Thermographic inspection means and non-destructive inspection method for the structure near the surface of a test object |
-
1981
- 1981-11-16 JP JP18334581A patent/JPS57163856A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6110751A (en) * | 1984-06-26 | 1986-01-18 | Ichiro Hatta | Measurement for diffusivity of heat by intermittent heating |
| JPH0479534B2 (en) * | 1984-06-26 | 1992-12-16 | Ichiro Hatsuta | |
| JPS61213759A (en) * | 1985-03-20 | 1986-09-22 | Shinku Riko Kk | Thermal diffusivity measuring device |
| JPH0479536B2 (en) * | 1985-03-20 | 1992-12-16 | Shinku Riko Kk | |
| US4933887A (en) * | 1985-05-10 | 1990-06-12 | Budapesti Muszaki Egyetem | Process and apparatus for the determination of thermo-physical properties |
| JP2017527813A (en) * | 2014-09-10 | 2017-09-21 | フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン | Thermographic inspection means and non-destructive inspection method for the structure near the surface of a test object |
| US11226301B2 (en) | 2014-09-10 | 2022-01-18 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Thermographic examination means and method for non-destructive examination of a near-surface structure at a test object |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6143658B2 (en) | 1986-09-29 |
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