KR101860477B1 - 탄화규소-지르코늄 탄질화물 복합 소재 제조용 조성물 및 이를 이용한 탄화규소-지르코늄 탄질화물 복합 소재의 제조방법 - Google Patents
탄화규소-지르코늄 탄질화물 복합 소재 제조용 조성물 및 이를 이용한 탄화규소-지르코늄 탄질화물 복합 소재의 제조방법 Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 80
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000000203 mixture Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 26
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 127
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 238000005245 sintering Methods 0.000 claims abstract description 62
- ZVWKZXLXHLZXLS-UHFFFAOYSA-N zirconium nitride Chemical compound [Zr]#N ZVWKZXLXHLZXLS-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 41
- 239000007791 liquid phase Substances 0.000 claims abstract description 37
- 239000000654 additive Substances 0.000 claims abstract description 35
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 33
- 230000000996 additive effect Effects 0.000 claims abstract description 33
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000010703 silicon Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000011812 mixed powder Substances 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium oxide Chemical compound O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012298 atmosphere Substances 0.000 claims abstract description 12
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000001556 precipitation Methods 0.000 claims abstract description 9
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 4
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims 2
- 239000000919 ceramic Substances 0.000 abstract description 30
- 239000012071 phase Substances 0.000 abstract description 23
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 15
- 239000002245 particle Substances 0.000 abstract description 12
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 abstract description 8
- 238000000280 densification Methods 0.000 abstract description 7
- 238000011065 in-situ storage Methods 0.000 abstract description 5
- 229910003465 moissanite Inorganic materials 0.000 abstract description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 abstract description 2
- 229910052706 scandium Inorganic materials 0.000 description 11
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- 239000000126 substance Substances 0.000 description 8
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 4
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- 238000007731 hot pressing Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
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- 239000012299 nitrogen atmosphere Substances 0.000 description 3
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- 229910052727 yttrium Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- UVGLBOPDEUYYCS-UHFFFAOYSA-N silicon zirconium Chemical compound [Si].[Zr] UVGLBOPDEUYYCS-UHFFFAOYSA-N 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 239000004743 Polypropylene Substances 0.000 description 1
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- 229910052772 Samarium Inorganic materials 0.000 description 1
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- 230000002411 adverse Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
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Abstract
본 발명에 따른 탄화규소-지르코늄 탄질화물(SiC-Zr2CN) 복합 소재의 제조방법에 의하면, β-탄화규소(β-SiC) 및 질화지르코늄(ZrN) 분말에 소결첨가제로서 산화이트륨(Y2O3) 및 산화스칸듐(Ⅲ)(Sc2O3)의 혼합 분말을 첨가하고 질소(N2) 분위기에서 소결함으로써, Y-Sc-Zr-Si-OCN으로 이루어진 유리질 액상이 형성되어 탄화규소가 β상에서 α상으로 상변태하는 것을 완벽히 억제하고, 액상소결(liquid phase sintering) 기구로 치밀화를 촉진시키며, 나아가, 용해-석출(dissolution-precipitation) 기구에 의해 질소 도핑된(N-doped) 탄화규소 입자를 성장시키고, 전기전도성이 뛰어난 지르코늄 탄질화물(Zr2CN) 결정립이 인시츄(in-situ) 합성되어, 모노리식(monolithc) 탄화규소와 비교하더라도 최대 10배 이상 향상된 전기전도성을 가지는 우수한 전기전도성 세라믹 복합 소재를 제조할 수 있다.
Description
도 2는 모노리식(monolithic) 탄화규소(SiC) 시편과 질화지르코늄(ZrN)이 첨가된 탄화규소(SiC) 복합체 시편의 미세구조를 보여주는 이미지이다.
도 3은 SZN35 시편에 대한 주사전자현미경(SEM) 이미지 및 에너지분산분광법(EDS)을 통한 Si, Zr, Y, Sc, C 및 N에 대한 도트 맵핑(dot mapping) 이미지를 나타낸다.
도 4(a) 및 도 4(b)는 모노리식(monolithic) 탄화규소(SiC) 시편과 질화지르코늄(ZrN)이 첨가된 탄화규소(SiC) 복합체 시편의 캐리어 농도, 캐리어 이동도 및 전기전도도를 출발 원료 조성물에 포함된 초기 질화지르코늄(ZrN) 함량의 함수로 나타낸 그래프이다.
도 5는 모노리식(monolithic) 탄화규소(SiC) 시편과 질화지르코늄(ZrN)이 첨가된 탄화규소(SiC) 복합체 시편의 열전도도(thermal conductivity) 및 포논 평균자유행로(phonon mean free path)를 나타낸 그래프이다.
| 시편명 | 배치 조성(vol%) | 배치 조성(wt%) |
이론
밀도 (g/cm 3 ) |
상대
밀도 (%) |
상온 열용량
(J/(gK)) |
상온 열확산도
(mm 2 /s) |
| SZN0 | 98.00% SiC + 1.13% Y2O3 + 0.87% Sc2O3 |
97.280% SiC + 1.026% Sc2O3 + 1.694% Y2O3 |
3.240 | 98.9 | 0.667 ±0.000 |
92.0 ±1.3 |
| SZN4 | 96.00% SiC + 4.00% ZrN + 1.13% Y2O3 + 0.87% Sc2O3 |
88.832% SiC + 8.567% ZrN + 0.986% Sc2O3 + 1.615% Y2O3 |
3.403 | 98.5 | 0.689 ±0.000 |
82.4 ±0.3 |
| SZN10 | 88.00% SiC + 10.00% ZrN + 1.13% Y2O3 + 0.87% Sc2O3 |
77.590% β-SiC + 19.984% ZrN + 0.920% Sc2O3 + 1.506% Y2O3 |
3.647 | 98.7 | 0.605 ±0.000 |
75.8 ±0.2 |
| SZN20 | 78.00% SiC + 20.00% ZrN +1.13% Y2O3 + 0.87% Sc2O3 |
61.864% β-SiC + 35.953% ZrN + 0.828% Sc2O3 + 1.355% Y2O3 |
4.055 | 99.5 | 0.715 ±0.000 |
55.1 ±0.1 |
| SZN35 | 63.00% SiC + 35.00% ZrN + 1.13% Y2O3 + 0.87% Sc2O3 |
43.425% β-SiC + 54.678% ZrN + 0.719% Sc2O3 + 1.178% Y2O3 |
4.666 | 99.0 | 0.570 ±0.000 |
38.1 ±0.1 |
Claims (10)
- 41.0 내지 91.0 중량%의 β-탄화규소(β-SiC); 8.0 내지 55.0 중량%의 질화지르코늄(ZrN); 및 1.0 내지 4.0 중량%의 소결 첨가제(sintering additive)를 포함하며,
상기 소결 첨가제는 산화이트륨(Y2O3) 및 산화스칸듐(Ⅲ)(Sc2O3)을 1 : 0.5 ~ 3의 몰비로 포함하는 것을 특징으로 하는 탄화규소-지르코늄 탄질화물(SiC-Zr2CN) 복합 소재 제조용 조성물. - 제 1항에 있어서, 상기 β-탄화규소는 마이크론(micron) 또는 서브마이크론(sub-micron) 분말인 것을 특징으로 하는 탄화규소-지르코늄 탄질화물(SiC-Zr2CN) 복합 소재 제조용 조성물.
- 삭제
- (a) 41.0 내지 91.0 중량%의 β-탄화규소(β-SiC) 분말; 8.0 내지 55.0 중량%의 질화지르코늄(ZrN) 분말; 및 1.0 내지 4.0 중량%의 소결 첨가제(sintering additive) 분말을 혼합하는 단계; 및
(b) 상기 단계 (a)에서 얻어진 혼합 분말을 이용해 질소(N2) 분위기하에서 소결해 탄화규소-지르코늄 탄질화물(SiC-Zr2CN) 복합 소재를 제조하는 단계를 포함하며,
상기 소결 첨가제는 산화이트륨(Y2O3) 및 산화스칸듐(Ⅲ)(Sc2O3)을 1 : 0.5 ~ 3의 몰비로 포함하는 것을 특징으로 하는 탄화규소-지르코늄 탄질화물(SiC-Zr2CN) 복합 소재의 제조방법. - 제 4항에 있어서,
상기 단계 (b)에서 1900 내지 2050 ℃의 온도 및 20 내지 60 MPa의 압력하에서 1 내지 12 시간동안 가압 소결하는 것을 특징으로 하는 탄화규소-지르코늄 탄질화물(SiC-Zr2CN) 복합 소재의 제조방법. - 제 5항에 있어서,
상기 단계 (b)에서 Y-Sc-Zr-Si-O-C-N 계 액상이 형성되어 액상소결(liquid phase sintering) 기구를 통해 치밀화가 이뤄지는 것을 특징으로 하는 탄화규소-지르코늄 탄질화물(SiC-Zr2CN) 복합 소재의 제조방법. - 제 6항에 있어서,
상기 단계 (b)에서 상기 Y-Sc-Zr-Si-O-C-N 계 액상으로부터 용해-석출(dissolution-precipitation) 기구를 통해 질소 원자(N)가 도핑된 탄화규소가 석출 및 성장하는 것을 특징으로 하는 탄화규소-지르코늄 탄질화물(SiC-Zr2CN) 복합 소재의 제조방법. - 제 4항 내지 제 7항 중 어느 한 항에 기재된 방법에 의해 제조된 탄화규소-지르코늄 탄질화물(SiC-Zr2CN) 복합 소재.
- 제 8항에 있어서,
상온에서의 전기 비저항(electrical resistivity)이 4.4 x 10-4 내지 1.1 x 10-2 Ω·cm이고, 상온에서의 열전도도(thermal conductivity)가 96 내지 190 W/mK인 것을 특징으로 하는 탄화규소-지르코늄 탄질화물(SiC-Zr2CN) 복합 소재. - 제 8항에 있어서,
상대밀도(relative density)가 98% 이상인 것을 특징으로 하는 탄화규소-지르코늄 탄질화물(SiC-Zr2CN) 복합 소재.
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| KR102012004B1 (ko) * | 2018-05-31 | 2019-08-19 | 한전원자력연료 주식회사 | 내 산화층이 형성된 탄화규소 소결체 및 이의 제조방법 |
| CN116874305A (zh) * | 2023-06-02 | 2023-10-13 | 中国科学院上海硅酸盐研究所 | 一种Si3N4-SiC-Zr2CN复相陶瓷吸波材料及其制备方法 |
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| US5262366A (en) | 1986-03-17 | 1993-11-16 | Sumitomo Electric Industries, Ltd. | Formation of a ceramic composite by centrifugal casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102012004B1 (ko) * | 2018-05-31 | 2019-08-19 | 한전원자력연료 주식회사 | 내 산화층이 형성된 탄화규소 소결체 및 이의 제조방법 |
| WO2019231045A1 (ko) * | 2018-05-31 | 2019-12-05 | 한전원자력연료 주식회사 | 내 산화층이 형성된 탄화규소 소결체 및 이의 제조방법 |
| CN116874305A (zh) * | 2023-06-02 | 2023-10-13 | 中国科学院上海硅酸盐研究所 | 一种Si3N4-SiC-Zr2CN复相陶瓷吸波材料及其制备方法 |
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