CN105973930A - Detection method of copper-based memory alloy martensite contravariant phase transformation energy - Google Patents
Detection method of copper-based memory alloy martensite contravariant phase transformation energy Download PDFInfo
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- CN105973930A CN105973930A CN201610268982.1A CN201610268982A CN105973930A CN 105973930 A CN105973930 A CN 105973930A CN 201610268982 A CN201610268982 A CN 201610268982A CN 105973930 A CN105973930 A CN 105973930A
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- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The invention discloses a detection method of a copper-based memory alloy martensite contravariant phase transformation energy; temperatures Tp of peak points of different inverse phase transformation endothermic peaks of a copper-based memory alloy at different heating rates Phi are detected by a differential scanning calorimetry analyzer, and the straight line slope rate of a linear equation with lg(Phi) and 1/Tp as variates, namely the copper-based memory alloy martensite contravariant phase transformation energy, is calculated. The detection method can be used for making copper-based memory alloy martensite contravariant experiment dynamics materialized, and the copper-based memory alloy martensite contravariant phase transformation energy can be obtained through mathematical analysis. The detection method is simple, the detection data is reliable, and the analysis is convenient.
Description
Technical field
The present invention relates to the experimental technique of inversion experimental dynamics, be specifically related to the phase of a kind of copper-based memory alloy martensite inversion
Become the detection method of energy.
Background technology
For copper-based shape memory alloy, when temperature reaches by martensite temperature As to parent phase changes, will
Be another kind solid phase from a kind of solid phase transformation, i.e. from Martensitic phase transformation be parent phase.It is the phase transformation of parent phase from Martensitic phase transformation
During, needing to absorb corresponding energy, be the phase-change energy of copper-based shape memory alloy martensite inversion, cuprio shape is remembered
The phase-change energy recalling alloy martensite inversion is particularly important for research copper-based memory alloy martensite inversion experimental dynamics,
But, so far, almost the unmanned phase-change energy proposition one to copper-based shape memory alloy martensite inversion detects accurately
Method.
Summary of the invention
It is an object of the invention to obtain the accurate phase-change energy that copper-based shape memory alloy is changed to parent phase by martensite, it is provided that
A kind of detection method of the phase-change energy of copper-based memory alloy martensite inversion.
For achieving the above object, the technical scheme is that
The detection method of the phase-change energy of a kind of copper-based memory alloy martensite inversion, by differential scanning calorimetry instrument detection difference
Temperature Tp at the summit of the different reverse transformation endothermic peaks of copper-based memory alloy under rate of heat addition Φ, calculates with lg Φ and 1/Tp
Straight slope as the linear equation of variable can obtain the phase-change energy of copper-based memory alloy martensite inversion.
Different heating rates can make temperature at the summit of reverse transformation endothermic peak produce small change, and the phase at summit
Variable Rate is identical；Because of dlg Φ/d (1/Tp) ≌ Δ E/2.19R, wherein, R=8.314Jmol-1K-1, by detection different heating speed
Rate Φ obtains temperature Tp at different summits, by lg Φ, the straight slope of 1/Tp mapping gained is Δ E/2.19R,
And then phase-change energy Δ E can be obtained, by DSC, the present invention detects that different heating rates can make the summit of reverse transformation endothermic peak
The temperature at place produces small change such that it is able to accurate Analysis goes out the phase-change energy of copper-based memory alloy martensite inversion, and solves
Analysis method is simple, it is not necessary to calculate in a large number, has saved the detection time, has added detection efficiency.
Preferably, concretely comprise the following steps:
(1) packaged copper-based memory alloy sample and standard specimen are individually placed to two sample stages of differential scanning calorimetry instrument
On；
(2) set the rate of heat addition and carry out Heating Experiment, determine the end temp Af that copper-based memory alloy changes to parent phase；
(3) end temp of the phase in version obtained according to step (2) sets the EP (end of program) temperature of experiment, so that it is determined that real
The temperature range of the temperature programming tested；
(4) temperature range determined according to step (3) sets different heating rates Φ and carries out Heating Experiment and obtain difference and add
Temperature Tp at the summit of the different reverse transformation endothermic peaks under hot speed Φ；
(5) according to the different Φ obtained in step (4) and different Tp, with lg Φ, 1/Tp is mapped, then utilize straight
The straight slope that line equation is tried to achieve can obtain the phase-change energy of copper-based memory alloy martensite inversion.
Preferably, the quality of the sample in described step (1) and standard specimen is 70 80 milligrams.
Preferably, in described step (1), standard specimen is α-Al2O3。
Preferably, the rate of heat addition of described step (2) is 10 DEG C/min.
Preferably, described step (3) Program end temp is higher than the end temp of phase in version 5-10 DEG C.Ensureing inspection
On the premise of survey, reduce detection time and energy consumption.
Preferably, arithmetic progression relation is become between the different heating rates of described step (4).Make to detect copper-based memory alloy
The phase-change energy of martensite inversion is the most accurate.
It is further preferred that described step (4) sets 5 kinds of different heating rates.
Further preferred, described different heating rates be respectively 5 DEG C/min, 10 DEG C/min, 15 DEG C/min, 20 DEG C/min,
25℃/min。
The invention have the benefit that
1, use the detection method of the present invention to be embodied by copper-based memory alloy martensite inversion experimental dynamics, pass through mathematics
Parsing can try to achieve copper-based memory alloy martensite inversion phase-change energy.
2, detection method is simple, detection data are reliable, it is convenient to resolve.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1: the detection method of the phase-change energy of a kind of copper-based memory alloy martensite inversion, comprises the following steps:
(1) by 70 milligrams of packaged copper-based memory alloy samples and 70 milligrams of standard specimen (α-Al2O3) be individually placed to differential and sweep
Retouch on two sample stages of thermometric analysis instrument；
(2) carry out Heating Experiment by the 10 DEG C/min rate of heat addition, determine the end temp that copper-based memory alloy changes to parent phase
Af；
(3) end temp of the phase in version obtained according to step (2) sets the EP (end of program) temperature of experiment, EP (end of program) temperature
Spend higher than the end temp of phase in version 5 DEG C, so that it is determined that the temperature range of the temperature programming of experiment；
(4) temperature range determined according to step (3) respectively with 5 DEG C/min, 10 DEG C/min, 15 DEG C/min, 20 DEG C/min,
25 DEG C/min carry out Heating Experiment and obtain different heating rates under different reverse transformation endothermic peaks summit at temperature Tp5、
Tp10、Tp15、Tp20、Tp25；
(5) according to the different Φ obtained in step (4) and different Tp, with lg Φ, 1/Tp is mapped, then utilize straight
The straight slope that line equation is tried to achieve, further according to dlg Φ/d (1/Tp) ≌ Δ E/2.19R, can obtain copper-based memory alloy martensite
The phase-change energy Δ E of inversion.
Embodiment 2: the detection method of the phase-change energy of a kind of copper-based memory alloy martensite inversion, comprises the following steps:
(1) by 70 milligrams of packaged copper-based memory alloy samples and 70 milligrams of standard specimen (α-Al2O3) be individually placed to differential and sweep
Retouch on two sample stages of thermometric analysis instrument；
(2) carry out Heating Experiment by the 10 DEG C/min rate of heat addition, determine the end temp that copper-based memory alloy changes to parent phase
Af；
(3) end temp of the phase in version obtained according to step (2) sets the EP (end of program) temperature of experiment, EP (end of program) temperature
Spend higher than the end temp of phase in version 5 DEG C, so that it is determined that the temperature range of the temperature programming of experiment；
(4) temperature range determined according to step (3) respectively with 5 DEG C/min, 15 DEG C/min, that 25 DEG C/min carries out heating is real
Test and obtain temperature Tp at the summit of different reverse transformation endothermic peaks under different heating rates5、Tp15、Tp25；
(5) according to the different Φ obtained in step (4) and different Tp, with lg Φ, 1/Tp is mapped, then utilize straight
The straight slope that line equation is tried to achieve is the phase-change energy of copper-based memory alloy martensite inversion.
Embodiment 3
The present embodiment is same as in Example 1, and difference is, step (1) copper-based memory alloy sample and standard specimen (α-Al2O3)
Quality be 80 milligrams.
Embodiment 4
The present embodiment is same as in Example 1, and difference is, step (3) EP (end of program) temperature is than the end temperature of phase in version
Spend high 10 DEG C
Embodiment 5
The present embodiment is same as in Example 1, and difference is, step (4) respectively with 2 DEG C/min, 7 DEG C/min, 12 DEG C/min,
17 DEG C/min, 22 DEG C/min carry out Heating Experiment and obtain different heating rates under different reverse transformation endothermic peaks summit at
Temperature Tp2、Tp7、Tp12、Tp17、Tp22。
Embodiment 6
The present embodiment is same as in Example 1, and difference is, step (4) respectively with 8 DEG C/min, 13 DEG C/min, 18 DEG C/min,
23 DEG C/min carry out Heating Experiment and obtain different heating rates under different reverse transformation endothermic peaks summit at temperature Tp8、
Tp13、Tp18、Tp23。
Although the detailed description of the invention of the present invention is described by above-described embodiment, but not restriction to invention protection domain,
One of ordinary skill in the art should be understood that those skilled in the art need not pay wound on the basis of the technical scheme of invention
Various amendments or adjustment that the property made work can be made are the most within the scope of the present invention.
Claims (9)
1. a detection method for the phase-change energy of copper-based memory alloy martensite inversion, is characterized in that, uses differential scanning calorimetry
Instrument detection different heating rates Φ under copper-based memory alloy different reverse transformation endothermic peaks summit at temperature Tp, calculate with
Lg Φ and 1/Tp can obtain the phase-change energy of copper-based memory alloy martensite inversion as the straight slope of the linear equation of variable.
The detection method of the phase-change energy of a kind of copper-based memory alloy martensite inversion the most as claimed in claim 1, is characterized in that,
Concretely comprise the following steps:
(1) packaged copper-based memory alloy sample and standard specimen are individually placed to two sample stages of differential scanning calorimetry instrument
On；
(2) set the rate of heat addition and carry out Heating Experiment, determine the end temp Af that copper-based memory alloy changes to parent phase；
(3) end temp of the phase in version obtained according to step (2) sets the EP (end of program) temperature of experiment, so that it is determined that real
The temperature range of the temperature programming tested；
(4) temperature range determined according to step (3) sets different heating rates Φ and carries out Heating Experiment and obtain difference and add
Temperature Tp at the summit of the different reverse transformation endothermic peaks under hot speed Φ；
(5) according to the different Φ obtained in step (4) and different Tp, with lg Φ, 1/Tp is mapped, then utilize straight
The straight slope that line equation is tried to achieve can obtain the phase-change energy of copper-based memory alloy martensite inversion.
The detection method of the phase-change energy of a kind of copper-based memory alloy martensite inversion the most as claimed in claim 1, is characterized in that,
Sample and the quality of standard specimen in described step (1) are 70 80 milligrams.
The detection method of the phase-change energy of a kind of copper-based memory alloy martensite inversion the most as claimed in claim 1, is characterized in that,
In described step (1), standard specimen is α-Al2O3。
The detection method of the phase-change energy of a kind of copper-based memory alloy martensite inversion the most as claimed in claim 1, is characterized in that,
The rate of heat addition of described step (2) is 10 DEG C/min.
The detection method of the phase-change energy of a kind of copper-based memory alloy martensite inversion the most as claimed in claim 1, is characterized in that,
Described step (3) Program end temp is higher than the end temp of phase in version 5-10 DEG C.
The detection method of the phase-change energy of a kind of copper-based memory alloy martensite inversion the most as claimed in claim 1, is characterized in that,
Arithmetic progression relation is become between the different heating rates of described step (4).
The detection method of the phase-change energy of a kind of copper-based memory alloy martensite inversion the most as claimed in claim 7, is characterized in that,
Described step (4) sets 5 kinds of different heating rates.
The detection method of the phase-change energy of a kind of copper-based memory alloy martensite inversion the most as claimed in claim 8, is characterized in that,
Described different heating rates be respectively 5 DEG C/min, 10 DEG C/min, 15 DEG C/min, 20 DEG C/min, 25 DEG C/min.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104342593A (en) * | 2013-08-04 | 2015-02-11 | 镇江忆诺唯记忆合金有限公司 | Copper-zinc-aluminum memory alloy for improving phase transformation point stability under hot and cold cycles |
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- 2016-04-27 CN CN201610268982.1A patent/CN105973930A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104342593A (en) * | 2013-08-04 | 2015-02-11 | 镇江忆诺唯记忆合金有限公司 | Copper-zinc-aluminum memory alloy for improving phase transformation point stability under hot and cold cycles |
Non-Patent Citations (2)
| Title |
|---|
| BAI YUJUN等: ""Influence of Heating Rates on Double Reversible Transformations in CuZnZlMnNi Shape Memory Alloy"", 《稀有金属材料与工程》 * |
| GENG GUILI等: ""DSC STUDY OF MARTENSITIC TRANSFORMATION KINETICS IN A Cu-Zn-Al-Mn-Ni SHAPE MEMORY ALLOY"", 《ACTA METALLURGICA SINICA》 * |
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Inventor after: Zhang Aimin Inventor after: Bai Yujun Inventor after: Geng Guili Inventor before: Geng Guili Inventor before: Bai Yujun |
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Application publication date: 20160928 |