http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이덕열 대한건축학회 1991 建築 Vol.35 No.3
우리나라의 엔지니어링 산업은 자연적으로 형성되었다기 보다는 1960년대 초부터 시작된 공업화의 과정에서 관련산업부문의 필요에 의해 부수적으로 형성되었다고 할 수 있다. 따라서 제조업, 건설업에 밀착된 산업으로서 영역은 방대하지만 주목을 받지 못했다. 그러나 1970년대에 접어들면서 풍부한 경험기술을 토대로 과학기술과 산업부문간을 연계하여 실용화 촉진의 핵심적 역할을 담당하는 엔지니어링은 두뇌집약적이고 고부가가치를 창출하여 관련 산업에의 파급효과가 크다는 점에서 하나의 산업으로서의 육성이 강조되었다.
이덕열,박기선 대한금속재료학회(대한금속학회) 1993 대한금속·재료학회지 Vol.31 No.8
Amorphous Ni_xZr_(100-x)(35≤×≤75) powders were produced by mechanical alloying of elemental powders and the short range order of the amorphous Ni_(35)Zr_(65), Ni_(45)Zr_(55), Ni_(55)Zr_(45) and Ni_(65)Zr_(35) alloys was characterized using X-ray diffraction. The partial interference functions, I_(NiNi)(K), I_(NiZr)(K) and I_(ZrZr)(K), were calculated from the total interference functions of the latter three alloys. The nearest neighbor distances for Ni-Ni, Ni-Zr and Zr-Zr atomic pairs in the amorphous Ni-Zr mechanical alloys turned out to be 2.400 2.654 and 3.282Å, respectively. The coordination number was 12.4∼12.9 depending on the composition. It was concluded that the atoms in the amorphous Ni-Zr alloys didn't behave like hard spheres and arrange themselves almost randomly even though there seemed to be a little tendency of preference for like neighbors. The total reduced atomic distribution functions of the amorphous Ni_(35)Zr_(65) alloys produced by mechanical alloying and liquid quenching looked alike but some differences were found in their partial functions.
Substrate 에 증착된 비정질 합금의 Ⅹ선회절 분석
이덕열 대한금속재료학회(대한금속학회) 1984 대한금속·재료학회지 Vol.22 No.7
It has quite often been observed that the interference functions of rare earth metal-transition metal amorphous alloys, which are prepared only by vapor deposition, show considerable deviation from the expected when evaluated directly from their X-ray diffraction intensity patterns. In this study efforts were made to find the causes and solutions thereof and, for that matter, X-ray diffraction experiments were performed both in transmission and reflection geometries on amorphous Co-Gd alloy films sputtered on a Be-substrate. It was found that, for a specimen on a substrate in reflection geometry, an adequate modification on the data reduction procedures or specifically the absorption correction should be made depending on the configuration of the specimen and substrate. Also it was realized that the data reduction procedure is relatively simpler when the substrate faces towards the incoming X-ray beam than the contrary.
316L 스테인리스강의 내식성 코팅에 관한 연구 : Ⅰ. Ni-Al 금속막 코팅 Ⅰ. Ni-Al Metallic Coating
이덕열,김남진,황일두,송석권 대한금속재료학회(대한금속학회) 1997 대한금속·재료학회지 Vol.35 No.9
316L stainless steel plates, which are usually used for metallic components of molten carbonate fuel cells, were coated with nickel and aluminum successively for the enhancement of their corrosion resistance. Electroplating and pack cementation were employed respectively for nickel and aluminum coating. The corrosion property of the coated specimen was checked by dipping test and anodic polarization test, and compared with those of the bare stainless steel and the one coated only with aluminum. In the case of dipping test the specimen was characterized, before and after the test, using optical microscopy to study the morphology of its cross-section, and X-ray diffraction to identify the phases of the coated layer. Intermetallic compound of Al₃Ni₂ was formed on the surface of the coated specimen and this specimen turned out to be highly resistant to corrosion, even more than the one coated only with aluminum.
Molten Carbonate Fuel Cell 용 Ni-Al anod 에서 미세구조가 creep 특성에 미치는 영향에 관한 연구
이덕열,김남진,임희천,윤호경 대한금속재료학회(대한금속학회) 2000 대한금속·재료학회지 Vol.38 No.4
To improve the creep resistance of the anode for molten carbonate fuel cell, the fabrication processes of Ni anode with different Al contents were investigated, where four types of sintering condition have been examined at different temperatures and gas atmospheres. The effects of such different sintering conditions on the secondary phases, and the morphologies of secondary phase of the anode were examined. If Al is added over the solid solution limit, Ni₃Al or Al₂O₃ are formed as a secondary phase according to the sintering conditions and degrees of creep strain and conductivity are changed as results. The creep test and porosimeter analysis certificated that the Ni₃Al intermetallic compound precipitation and Al₂O₃ dispersion hardened structure had good creep resistances with suitable pore size distributions for anode, which resulted in the stable mechanical performances.
이덕열,김성겸 대한금속재료학회(대한금속학회) 1998 대한금속·재료학회지 Vol.36 No.10
Amorphous Ni-Zr alloys were produced by mechanical alloying of elemental powders and the hydrogen storage site in these alloys was predicted based on the experimental results of maximum hydrogen content per metal atom and those of atomic distribution functions obtained respectively from hydrogen absorption and X-ray diffraction experiments. Both results were applied to Harris model which is that hydrogen atoms occupy the interstitial sites in five types of A_(4-n)B_n(n=4, 3, 2, 1, 0) [where A(B) is a late(early) transition metal] tetrahedrons in the order of increasing site energies and explained well by this model.