CN1228531A - 一种超高温热电偶屏蔽罩及其制备 - Google Patents
一种超高温热电偶屏蔽罩及其制备 Download PDFInfo
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- CN1228531A CN1228531A CN 98113809 CN98113809A CN1228531A CN 1228531 A CN1228531 A CN 1228531A CN 98113809 CN98113809 CN 98113809 CN 98113809 A CN98113809 A CN 98113809A CN 1228531 A CN1228531 A CN 1228531A
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- 238000002360 preparation method Methods 0.000 title claims description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 17
- 229910021332 silicide Inorganic materials 0.000 claims abstract description 14
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000956 alloy Substances 0.000 claims abstract description 12
- 239000003870 refractory metal Substances 0.000 claims abstract description 11
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 3
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 3
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 3
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 3
- 238000009792 diffusion process Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 239000012190 activator Substances 0.000 claims description 2
- 239000003961 penetration enhancing agent Substances 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract 1
- 229910001092 metal group alloy Inorganic materials 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000005275 alloying Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910001257 Nb alloy Inorganic materials 0.000 description 2
- 229910000601 superalloy Inorganic materials 0.000 description 2
- 229910001362 Ta alloys Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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Abstract
一种超高温热电偶屏蔽罩,该热电偶屏蔽罩以难熔金属Nb、W、Mo、Ta或其合金为基体材料,外表面包覆一厚20～50μm的该基体难熔金属的硅化物涂层。本发明用施加硅化物涂层的难熔金属及其合金作为屏蔽罩材料,可以实现1400℃以上超高温温度场的测定。和镍基合金材料屏蔽罩相比,大大提高了可测试温度。
Description
本发明涉及高温材料及防护技术，特别提供了一种超高温热电偶屏蔽罩及其制备技术。
为了用热电偶直接检测发动机燃烧室出口温度场的分布情况，必须有一个屏蔽罩使热电偶免受火焰或气流的直接喷射，这就要求屏蔽罩比测温系统其它部件更能承受高温。以前，屏蔽罩采用普通的镍基高温合金(如K17,M41)作为屏蔽罩材料，可以完成1200℃以下温度场的测定。为提高发动机的效率，燃烧室温度不断提高，可达1400℃，在该温度下，由于受到合金熔点的限制，镍基高温合金不能使用，为此寻找新的超高温屏蔽罩材料是解决1400℃以上温度场测定的关键问题。
本发明的目的在于提供一种超高温热电偶屏蔽置及其制备技术，其可在1400℃以上的工作环境中使用，其有优异的抗高温氧化性能。
本发明提供了一种超高温热电偶屏蔽罩，其特征在于：该热电偶屏蔽罩以难熔金属Nb、W、Mo、Ta或其合金为基体材料，外表面包覆一厚20～50μm的该基体难熔金属的硅化物涂层。
此外，本发明还提供了上述超高温热电偶屏蔽罩的制备，其特征在于：以难熔金属或其合金制成热电偶屏蔽罩形状；再将其进行热扩散渗硅，包埋介质(重量计)以30～70％Si作渗剂，0.5～4％卤化物作活化剂，余量的Al2O3或SiO2作添料；扩散温度900～1000℃，时间2～10小时。
本发明用施加硅化物涂层的难熔金属及其合金作为屏蔽罩材料，可以实现1400℃以上超高温温度场的测定。和镍基合金材料屏蔽罩相比，大大提高了可测试温度。下面通过实施例详述本发明。
实施例1施加硅化物涂层的铌合金作为屏蔽罩材料
选用具有高溶点的Nb752合金为屏蔽罩材料，其合金成分为：Nb-10 W-2.5 Zr(wt％)。将其加工成屏蔽罩，然后采用固体粉末法施加硅化物涂层，包埋介质为30Si+68Al2O3+2NH4Cl(wt％)，将屏蔽罩放入包埋介质中，在充氩气保护条件下加热到950℃，保温5小时得到以NbSi2为主的硅化物涂层，涂层厚度约40um。涂层和基材结合很好。该屏蔽罩在1400℃燃气环境中工作5小时仍保持完好，起到很好的阻挡火焰和热气流的目的。
实施例2施加硅化物涂层的D-43铌合金作为屏蔽罩材料
选用具有高熔点的D-43合金为屏蔽罩材料，其合金成分为：Nb-10W-Zr(wt％)，将其加工成屏蔽罩，然后采用固体粉末法施加硅化物涂层。包埋介质为30Si+70Al2O3+2NH4Cl(wt％)，将屏蔽罩放入包埋介质中，在充氩气保护条件下加热到1000℃，保温5小时得到以NbSi2为主的硅化物涂层，涂层厚度约50umm，涂层和基材结合很好。该屏蔽罩在1400℃燃气环境中工作6小时仍保护完好，起到很好的阻挡火焰和热气流的目的。
实施例3施加硅化物涂层的Ta-10W钽合金作为屏蔽罩材料
选用具有高熔点的Ta-10W合金为屏蔽罩材料，其合金成分为：Ta-10W(wt％)，将其加工成屏蔽罩，然后采用固体粉末法施加硅化物涂层。包埋介质为38Si+60Al2O3+2NH4Cl(wt％)，将屏蔽罩放入包埋介质中，在充氩气保护条件下加热到900℃，保温5小时得到以TaSi2为主的硅化物涂层，涂层厚度约50um，涂层和基材结合很好。该屏蔽罩在1400℃燃气环境中工作4小时仍保护完好，起到很好的阻挡火焰和热气流的目的。
Claims (2)
1．一种超高温热电偶屏蔽罩，其特征在于：该热电偶屏蔽罩以难熔金属Nb、W、Mo、Ta或其合金为基体材料，外表面包覆一厚20～50μm的该基体难熔金属的硅化物涂层。
2．按权利要求1所述超高温热电偶屏蔽罩的制备，其特征在于：以难熔金属或其合金制成热电偶屏蔽罩形状；再将其进行热扩散渗硅，包埋介质(重量计)以30～70％Si作渗剂，0.5～4％卤化物作活化剂，余量的Al2O3或SiO2作添料；扩散温度900～1000℃，时间2～10小时。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113809 CN1117973C (zh) | 1998-03-05 | 1998-03-05 | 一种超高温热电偶屏蔽罩及其制备 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113809 CN1117973C (zh) | 1998-03-05 | 1998-03-05 | 一种超高温热电偶屏蔽罩及其制备 |
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| Publication Number | Publication Date |
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| CN1228531A true CN1228531A (zh) | 1999-09-15 |
| CN1117973C CN1117973C (zh) | 2003-08-13 |
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| CN 98113809 Expired - Fee Related CN1117973C (zh) | 1998-03-05 | 1998-03-05 | 一种超高温热电偶屏蔽罩及其制备 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414277C (zh) * | 2003-11-14 | 2008-08-27 | 刘元庆 | 热电偶保护套管的制造方法 |
| CN105112915A (zh) * | 2015-04-30 | 2015-12-02 | 宁夏东方钽业股份有限公司 | 抗氧化材料及用其制备钽钨合金抗氧化涂层的方法 |
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1998
- 1998-03-05 CN CN 98113809 patent/CN1117973C/zh not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414277C (zh) * | 2003-11-14 | 2008-08-27 | 刘元庆 | 热电偶保护套管的制造方法 |
| CN105112915A (zh) * | 2015-04-30 | 2015-12-02 | 宁夏东方钽业股份有限公司 | 抗氧化材料及用其制备钽钨合金抗氧化涂层的方法 |
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| CN1117973C (zh) | 2003-08-13 |
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