CN106814023A - Silicon nitride product corrosion test method - Google Patents
Silicon nitride product corrosion test method Download PDFInfo
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- CN106814023A CN106814023A CN201510893250.7A CN201510893250A CN106814023A CN 106814023 A CN106814023 A CN 106814023A CN 201510893250 A CN201510893250 A CN 201510893250A CN 106814023 A CN106814023 A CN 106814023A
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- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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Abstract
Silicon nitride product corrosion test method, comprises the following steps：（1) silicon nitride product to be tested is inserted into preheating zone passage, raffinal is loaded into crucible；（2）Nitrogen displacement is passed through so that the partial pressure of oxygen around crucible begins to warm up after being less than 10 μ l/L；（3）Treat that aluminium melts and is heated 795-800 DEG C, and maintain 2-7 minutes, by roller insertion apparatus by step（1）Silicon nitride product insert continually；（4）Promote the silicon nitride product of insertion；（5）Silicon nitride product is pushed into outlet casting mold after being sufficiently humidified so as to by aluminum melt；（6）They are cut off and separated by the last joining place segmenting device in silicon nitride product；（7）Measure the corrosion depth of silicon nitride product aluminium.The present invention can carry out effective test to silicon nitride product corrosion, and time-consuming shorter, error is smaller, and testing cost is substantially reduced, beneficial to the lifting of silicon nitride product quality.
Description
Technical field
The present invention relates to new material technology field, specially silicon nitride product corrosion test method.
Background technology
Silicon nitride is a kind of typical non-oxide ceramicses, with heat-resisting, wear-resisting, anticorrosive, high rigidity, the premium properties such as high rigidity, insulation.And aluminium be both a kind of high-performance mass than engineering material be a kind of good conductive material, be the metal material that usage amount is only second to steel.In actual applications, there are two kinds of materials of silicon nitride and aluminium in many occasions simultaneously.Silicon nitride ceramics can be used as aluminum melting crucible [1], stalk, directly be contacted with aluminum melt, be corroded by aluminum melt, and silicon nitride influences silicon nitride crucible, the service life of stalk with the reaction of aluminium；Silicon nitride particle, fiber can prepare silicon nitride/aluminium composite material, and interfacial reaction directly affects the performance of boundary strength and fiber, so as to the performance to composite produces strong influence；The yield strength of aluminium is low, with ceramic joining after thermal stress it is small, can be used as silicon nitride ceramics connecting material, interfacial reaction determines bonding strength.
But, not rational silicon nitride product corrosion test method at present.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of silicon nitride product corrosion test method.
Technical problem solved by the invention is realized using following technical scheme：
Silicon nitride product corrosion test method, comprises the following steps
（1) silicon nitride product to be tested is inserted into preheating zone passage, raffinal is loaded into crucible；
（2）Nitrogen displacement is passed through so that the partial pressure of oxygen around crucible begins to warm up after being less than 10 μ l/L；
（3）Treat that aluminium melts and is heated 795-800 DEG C, and maintain 2-7 minutes, by roller insertion apparatus by step（1）Silicon nitride product insert continually；
（4）The silicon nitride product of insertion is promoted to pass sequentially through preheating zone, into the aluminum melt in crucible and movable within；
（5）Silicon nitride product is pushed into outlet casting mold after being sufficiently humidified so as to by aluminum melt, in each solidifying a layer thickness that connects of silicon nitride product upper and lower surface for 0.5-0.6
Mm, width is the aluminium sheet of 25-27mm；
（6）They are cut off and separated by the last joining place segmenting device in silicon nitride product；
（7）Measure the corrosion depth of silicon nitride product aluminium.
In the present invention, as a kind of perferred technical scheme, step（1）In, raffinal contains aluminium more than 99.9%.
In the present invention, as a kind of perferred technical scheme, step（1）In, the thickness of the silicon nitride product to be tested is 0.81-0.87
Mm, length and width are respectively 100-104mm and 30
-32mm 。
In the present invention, as a kind of perferred technical scheme, step（2）In, make the partial pressure of oxygen around crucible be 8 μ l/L.
In the present invention, as a kind of perferred technical scheme, step（3）In, aluminium melts and is heated 800 DEG C, and maintains 5 minutes.
In the present invention, as a kind of perferred technical scheme, step（5）In, the aluminium plate thickness that connects is coagulated for 0.6 mm in silicon nitride product upper and lower surface, width is 26mm.
As a result of above technical scheme, the invention has the advantages that：
The present invention can carry out effective test to silicon nitride product corrosion, and time-consuming shorter, error is smaller, there is provided reliable experimental data, and testing cost is substantially reduced, beneficial to the lifting of silicon nitride product quality.
It is as follows with traditional actual environment corrosion test method contrast：
| Project | It is time-consuming | Testing cost | Error |
| Method of testing of the present invention | 5h | 390 yuan/time | 1%-2.5% |
| Conventional test methodologies | 3 days | 675 yuan/time | More than 5% |
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that the present invention is realized are easy to understand, with reference to specific embodiment, the present invention is expanded on further.
Embodiment 1
Silicon nitride product corrosion test method, comprises the following steps
（1) silicon nitride product to be tested is inserted into preheating zone passage, raffinal is loaded into crucible, raffinal contains aluminium more than 99.9%, the thickness of the silicon nitride product to be tested is 0.81 mm, length and width is respectively 100mm and 30mm；
（2）Nitrogen displacement is passed through so that the partial pressure of oxygen around crucible begins to warm up after being less than 10 μ l/L；
（3）Treat that aluminium melts and is heated 795 DEG C, and maintain 2 minutes, by roller insertion apparatus by step（1）Silicon nitride product insert continually；
（4）The silicon nitride product of insertion is promoted to pass sequentially through preheating zone, into the aluminum melt in crucible and movable within；
（5）Silicon nitride product is pushed into outlet casting mold after being sufficiently humidified so as to by aluminum melt, is 0.6 in each solidifying a layer thickness that connects of silicon nitride product upper and lower surface
Mm, width is the aluminium sheet of 27mm；
（6）They are cut off and separated by the last joining place segmenting device in silicon nitride product；
（7）Measure the corrosion depth of silicon nitride product aluminium.
Embodiment 2
Silicon nitride product corrosion test method, comprises the following steps
（1) silicon nitride product to be tested is inserted into preheating zone passage, raffinal is loaded into crucible, raffinal contains aluminium more than 99.9%, the thickness of the silicon nitride product to be tested is 0.87 mm, length and width is respectively 104mm and 32mm；
（2）Nitrogen displacement is passed through so that the partial pressure of oxygen around crucible after 7 μ l/L to begin to warm up；
（3）Treat that aluminium melts and is heated 800 DEG C, and maintain 7 minutes, by roller insertion apparatus by step（1）Silicon nitride product insert continually；
（4）The silicon nitride product of insertion is promoted to pass sequentially through preheating zone, into the aluminum melt in crucible and movable within；
（5）Silicon nitride product is pushed into outlet casting mold after being sufficiently humidified so as to by aluminum melt, is 0.6 in each solidifying a layer thickness that connects of silicon nitride product upper and lower surface
Mm, width is the aluminium sheet of 27mm；
（6）They are cut off and separated by the last joining place segmenting device in silicon nitride product；
（7）Measure the corrosion depth of silicon nitride product aluminium.
Embodiment 3
Silicon nitride product corrosion test method, comprises the following steps
（1) silicon nitride product to be tested is inserted into preheating zone passage, raffinal is loaded into crucible, raffinal contains aluminium more than 99.9%, the thickness of the silicon nitride product to be tested is 0.85 mm, length and width is respectively 103mm and 31mm；
（2）Nitrogen displacement is passed through so that the partial pressure of oxygen around crucible after 8 μ l/L to begin to warm up；
（3）Treat that aluminium melts and is heated 800 DEG C, and maintain 5 minutes, by roller insertion apparatus by step（1）Silicon nitride product insert continually；
（4）The silicon nitride product of insertion is promoted to pass sequentially through preheating zone, into the aluminum melt in crucible and movable within；
（5）Silicon nitride product is pushed into outlet casting mold after being sufficiently humidified so as to by aluminum melt, is 0.6 in each solidifying a layer thickness that connects of silicon nitride product upper and lower surface
Mm, width is the aluminium sheet of 26mm；
（6）They are cut off and separated by the last joining place segmenting device in silicon nitride product；
（7）Measure the corrosion depth of silicon nitride product aluminium.
Embodiment 4
Silicon nitride product corrosion test method, comprises the following steps
（1) silicon nitride product to be tested is inserted into preheating zone passage, raffinal is loaded into crucible, raffinal contains aluminium more than 99.9%, the thickness of the silicon nitride product to be tested is 0.86mm, length and width is respectively 102mm and 30mm；
（2）Nitrogen displacement is passed through so that the partial pressure of oxygen around crucible after 10 μ l/L to begin to warm up；
（3）Treat that aluminium melts and is heated 796 DEG C, and maintain 3 minutes, by roller insertion apparatus by step（1）Silicon nitride product insert continually；
（4）The silicon nitride product of insertion is promoted to pass sequentially through preheating zone, into the aluminum melt in crucible and movable within；
（5）Silicon nitride product is pushed into outlet casting mold after being sufficiently humidified so as to by aluminum melt, is 0.5 in each solidifying a layer thickness that connects of silicon nitride product upper and lower surface
Mm, width is the aluminium sheet of 27mm；
（6）They are cut off and separated by the last joining place segmenting device in silicon nitride product；
（7）Measure the corrosion depth of silicon nitride product aluminium.
Embodiment 5
Silicon nitride product corrosion test method, comprises the following steps
（1) silicon nitride product to be tested is inserted into preheating zone passage, raffinal is loaded into crucible, raffinal contains aluminium more than 99.9%, the thickness of the silicon nitride product to be tested is 0.86 mm, length and width is respectively 100mm and 32mm；
（2）Nitrogen displacement is passed through so that the partial pressure of oxygen around crucible after 9 μ l/L to begin to warm up；
（3）Treat that aluminium melts and is heated 795 DEG C, and maintain 7 minutes, by roller insertion apparatus by step（1）Silicon nitride product insert continually；
（4）The silicon nitride product of insertion is promoted to pass sequentially through preheating zone, into the aluminum melt in crucible and movable within；
（5）Silicon nitride product is pushed into outlet casting mold after being sufficiently humidified so as to by aluminum melt, is 0.6 in each solidifying a layer thickness that connects of silicon nitride product upper and lower surface
Mm, width is the aluminium sheet of 25mm；
（6）They are cut off and separated by the last joining place segmenting device in silicon nitride product；
（7）Measure the corrosion depth of silicon nitride product aluminium.
Those of ordinary skill in the art should be understood：The discussion of any of the above embodiment is exemplary only, it is not intended that imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, can also be combined between technical characteristic in above example or different embodiments, step can be realized with random order, and there are many other changes of different aspect of the invention as described above, and for simplicity, they are provided not in details.Therefore, all any omission, modification, equivalent, improvement within the spirit and principles in the present invention, made etc., should be included within the scope of the present invention.
Claims (6)
1. silicon nitride product corrosion test method, it is characterized in that, comprise the following steps：
（1) silicon nitride product to be tested is inserted into preheating zone passage, raffinal is loaded into crucible；
（2）Nitrogen displacement is passed through so that the partial pressure of oxygen around crucible begins to warm up after being less than 10 μ l/L；
（3）Treat that aluminium melts and is heated 795-800 DEG C, and maintain 2-7 minutes, by roller insertion apparatus by step（1）Silicon nitride product insert continually；
（4）The silicon nitride product of insertion is promoted to pass sequentially through preheating zone, into the aluminum melt in crucible and movable within；
（5）Silicon nitride product is pushed into outlet casting mold after being sufficiently humidified so as to by aluminum melt, and in each solidifying a layer thickness that connects of silicon nitride product upper and lower surface for 0.5-0.6 mm, width is the aluminium sheet of 25-27mm；
（6）They are cut off and separated by the last joining place segmenting device in silicon nitride product；
（7）Measure the corrosion depth of silicon nitride product aluminium.
2. silicon nitride product corrosion test method as claimed in claim 1, it is characterized in that, step（1）In, raffinal contains aluminium more than 99.9%.
3. silicon nitride product corrosion test method as claimed in claim 1, it is characterized in that, step（1）In, the thickness of the silicon nitride product to be tested is 0.81-0.87 mm, length and width is respectively 100-104mm and 30-32mm.
4. silicon nitride product corrosion test method as claimed in claim 1, it is characterized in that, step（2）In, make the partial pressure of oxygen around crucible be 8 μ l/L.
5. silicon nitride product corrosion test method as claimed in claim 1, it is characterized in that, step（3）In, aluminium melts and is heated 800 DEG C, and maintains 5 minutes.
6. silicon nitride product corrosion test method as claimed in claim 1, it is characterized in that, step（5）In, the aluminium plate thickness that connects is coagulated for 0.6mm in silicon nitride product upper and lower surface, width is 26mm.
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| CN201510893250.7A CN106814023A (en) | 2015-11-27 | 2015-11-27 | Silicon nitride product corrosion test method |
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| CN201510893250.7A CN106814023A (en) | 2015-11-27 | 2015-11-27 | Silicon nitride product corrosion test method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865814A (en) * | 2010-04-02 | 2010-10-20 | 上海工程技术大学 | Thermal barrier coating layer high-temperature resistance molten salt corrosion test method and device |
| CN102346127A (en) * | 2011-09-08 | 2012-02-08 | 浙江向日葵光能科技股份有限公司 | Solution for measuring compactness of silicon nitride film of solar cell and application method thereof |
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2015
- 2015-11-27 CN CN201510893250.7A patent/CN106814023A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865814A (en) * | 2010-04-02 | 2010-10-20 | 上海工程技术大学 | Thermal barrier coating layer high-temperature resistance molten salt corrosion test method and device |
| CN102346127A (en) * | 2011-09-08 | 2012-02-08 | 浙江向日葵光能科技股份有限公司 | Solution for measuring compactness of silicon nitride film of solar cell and application method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李国才等: "界面无氧化膜条件下氮化硅陶瓷和铝溶液的反应", 《稀有金属材料与工程》 * |
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Application publication date: 20170609 |