188 research outputs found

    Development of Experimental Methodology for Evaluation of Rubber-Steel Ahesion at Fatigue Loading Conditions

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    V teoretickรฉ ฤรกsti je prรกce zamฤ›ล™enรก na nejdลฏleลพitฤ›jลกรญ aspekty pล™i tvorbฤ› novรฉho spojenรญ, zejmรฉna mezi gumou a ocelรญ a to vฤetnฤ› metod povrchovรฝch รบprav, struฤnรฉho seznamu vรฝ-znamnรฝch adheziv pล™es popis samotnรฉho spoje aลพ po jeho testovรกnรญ. Experiment je zamฤ›ล™en na popis jednotlivรฝch krokลฏ pล™i tvorbฤ› spoje v laboratornรญch podmรญnkรกch a pล™edevลกรญm na samotnรฉ zkuลกebnรญ metody a jejich vรฝznam pล™i hodnocenรญ kvality spoje se zvlรกลกtnรญm oh-ledem na dynamickรฉ namรกhรกnรญ.In the theoretical part, the thesis is focused on the most important aspects in the creation of a new adhesive connection, especially between rubber and steel, including surface treatment methods, a short list of important adhesives through the description of the bond itself and its testing. The analysis focuses on the description of the individual steps in the creation of the bond in the laboratory conditions and primarily on the test methods and their importance in evaluating the quality of the connection with the special regards on the fatigue loading conditions.รšstav inลพenรฝrstvรญ polymer

    Technology of Welding and Joining

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    In this book, you will find information on new materials and new welding technologies. Problems related to the welding of difficult-to-weld materials are considered and solved. The latest welding technologies and processes are presented. This book provides an opportunity to learn about the latest trends and developments in the welding industry. Enjoy reading

    Corrosion in Concrete: Inhibitors and Coatings

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    Improving the durability of reinforced concrete structures is a mandatory strategy to reduce the environmental impact of construction materials together with aiming to limit carbon dioxide emissions, energy consumption and natural raw materials depletion. Hence, for both new and existing concrete structures, proper protective techniques are required to prevent premature failure induced by environmental aggressive agents. The book presents the most innovative findings both in designing durable new constructions and toward solving durability deficiencies in existing concrete structures, such as innovative special coatings, hydrophobic impregnations and pore blocking treatments that are very efficient in severe aggressive environments (seawater, biocorrosion, etc.). Moreover, migrant corrosion inhibitors applied on concrete surfaces are able to greatly improve resistance against both chloride and CO2. Finally, special reinforcements and fibers, together with a proper designed cathodic protection, can greatly contribute to obtaining long-life reinforced concrete structures, significantly increasing the sustainability of concrete construction

    ๋ถ„์ž ์ ‘ํ•ฉ์„ ํ†ตํ•œ ๊ฐ•ํŒ/ํ”Œ๋ผ์Šคํ‹ฑ ๋ณตํ•ฉ์žฌ๋ฃŒ์˜ ๊ณ„๋ฉด ์ ‘ํ•ฉ๋ ฅ ํ–ฅ์ƒ

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    ํ•™์œ„๋…ผ๋ฌธ(๋ฐ•์‚ฌ) -- ์„œ์šธ๋Œ€ํ•™๊ต๋Œ€ํ•™์› : ๊ณต๊ณผ๋Œ€ํ•™ ์žฌ๋ฃŒ๊ณตํ•™๋ถ€, 2023. 2. ์•ˆ์ฒ ํฌ.๊ฐ•ํŒ/ํ”Œ๋ผ์Šคํ‹ฑ ๋ณตํ•ฉ ์žฌ๋ฃŒ๋Š” ๋ณตํ•ฉ์žฌ์˜ ๋ฌด๊ฒŒ๋ฅผ ํšจ๊ณผ์ ์œผ๋กœ ์ค„์ž„๊ณผ ๋™์‹œ์— ๊ณ ๊ฐ•์„ฑ, ๋‚ดํ”ผ๋กœ์„ฑ, ๋‚ด์ถฉ๊ฒฉ์„ฑ ๋“ฑ์˜ ๋‹ค์–‘ํ•œ ์žฅ์ ๋ฟ ์•„๋‹ˆ๋ผ ์—ด๊ณผ ์ง„๋™ ๋ฐ ์†Œ์Œ ์ฐจํ์™€ ๊ฐ™์€ ๋‹ค๊ธฐ๋Šฅ์  ํŠน์„ฑ์„ ๋‚˜ํƒ€๋‚ด์–ด ์˜ค๋žœ ๊ธฐ๊ฐ„ ์ฃผ๋ชฉ ๋ฐ›์•„์™”๋‹ค. ์ด๋Ÿฌํ•œ ํŠน์ƒ‰๋“ค์€ ๊ฐ•ํŒ/ํ”Œ๋ผ์Šคํ‹ฑ ๋ณตํ•ฉ ์žฌ๋ฃŒ์— ๋Œ€ํ•œ ์ˆ˜์š”๋ฅผ ์ฆ๊ฐ€์‹œํ‚ค๊ณ  ์žˆ์œผ๋ฉฐ, ์—๋„ˆ์ง€ ์œ„๊ธฐ ๊ธฐ๊ฐ„ ๋™์•ˆ ๊ฒฝ๋Ÿ‰ํ™”๊ฐ€ ์‹œ๊ธ‰ํžˆ ๋Œ€๋‘๋˜๊ณ  ์žˆ๋Š” ์ž๋™์ฐจ ์‚ฐ์—…์—์„œ ํŠนํžˆ ์ˆ˜์š”๊ฐ€ ์ฆ๊ฐ€ํ•˜๊ณ  ์žˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ์ƒ์šฉํ™”๋œ ๊ฐ•ํŒ/ํ”Œ๋ผ์Šคํ‹ฑ ๋ณตํ•ฉ ์žฌ๋ฃŒ๋Š” ๋ฏธ๊ตญ์˜ MSC ์‚ฌ์—์„œ ๊ฐœ๋ฐœ๋œ Smartsteelยฎ ์ œํ’ˆ์ด ์œ ์ผํ•˜๋ฉฐ, ๊ฐœ๋ฐœ ํ•„์š”์„ฑ์— ๋น„ํ•˜์—ฌ ๊ด€๋ จ ์—ฐ๊ตฌ๋Š” ๋งค์šฐ ๋ฏธํกํ•œ ์‹ค์ •์ด๋‹ค. ๊ฐ•ํŒ/ํ”Œ๋ผ์Šคํ‹ฑ ๋ณตํ•ฉ ์žฌ๋ฃŒ ๊ฐœ๋ฐœ์— ์žˆ์–ด ๊ฐ€์žฅ ๋„์ „์ ์ธ ํ•ต์‹ฌ ์š”์†Œ๋Š” ๊ฐ•ํŒ๊ณผ ํ”Œ๋ผ์Šคํ‹ฑ๊ฐ„ ๊ณ„๋ฉด ์ ‘ํ•ฉ์ด๋‹ค. ๊ตฌ์กฐ์žฌ ๋ชฉ์ ์œผ๋กœ ํ™œ์šฉํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ๊ฒฌ๊ณ ํ•˜๊ณ  ์ง€์† ๊ฐ€๋Šฅํ•œ ๊ณ„๋ฉด ์ ‘ํ•ฉ ํŠน์„ฑ์ด ์š”๊ตฌ๋œ๋‹ค. ๊ธฐํŒ์˜ ํ‘œ๋ฉด ์š”์ฒ ์— ํก์ฐฉ๋˜๋Š” ๊ธฐ์กด์˜ ๋ฌผ๋ฆฌ์  ์ ‘ํ•ฉ ๋ฐฉ์‹์€ ์˜จ๋„, ์Šต๋„ ํ˜น์€ ์‘๋ ฅ๊ณผ ๊ฐ™์€ ์™ธ๋ถ€ ์กฐ๊ฑด์— ์˜ํ•œ ๊ณ„๋ฉด ์ ‘ํ•ฉ๋ ฅ ์ €ํ•˜์™€ ๊ณ„๋ฉด์—์„œ ๋ฐœ์ƒํ•˜๋Š” ๋ฐ•๋ฆฌ ํ˜„์ƒ์œผ๋กœ ์ธํ•˜์—ฌ ๋‚ด๊ตฌ์„ฑ ๋ฐ ํ™œ์šฉ์„ฑ์ด ๋‚ฎ์€ ๊ฒฐํ•จ์ด ์กด์žฌํ•œ๋‹ค. ๊ฐ•ํŒ๊ณผ ํ”Œ๋ผ์Šคํ‹ฑ์˜ ๋†’์€ ์ ‘ํ•ฉ ํŠน์„ฑ ์œ ๋„๋ฅผ ์œ„ํ•˜์—ฌ ๋ ˆ์ด์ € ์šฉ์ ‘ ๋ฐ ์‚ฌ์ถœ ์„ฑํ˜•์„ ํ†ตํ•œ ์ง์ ‘ ๊ฒฐํ•ฉ๊ณผ ๊ฐ™์€ ์ƒˆ๋กœ์šด ๊ธฐ์ˆ ๋“ค์ด ์ตœ๊ทผ ๊ฐœ๋ฐœ๋˜๊ณ  ์žˆ์œผ๋‚˜, ๋†’์€ ๋น„์šฉ๊ณผ ๋‹ค์–‘ํ•œ ์žฌ๋ฃŒ์— ๋Œ€ํ•œ ์ ์šฉ ๊ฐ€๋Šฅ์„ฑ์ด ๋‚ฎ๋‹ค๋Š” ํ•œ๊ณ„๋กœ ์ธํ•˜์—ฌ ์—ฌ์ „ํžˆ ๋„๋ฆฌ ํ™œ์šฉ๋˜์ง€ ๋ชปํ•˜๊ณ  ์žˆ๋‹ค. ๊ณ„๋ฉด ์ ‘ํ•ฉ ํŠน์„ฑ์„ ํ–ฅ์ƒ์‹œํ‚ค๊ธฐ ์œ„ํ•ด์„œ๋Š” ๊ฐ•ํŒ/ํ”Œ๋ผ์Šคํ‹ฑ ๊ณ„๋ฉด์— ๋Œ€ํ•œ ์ถฉ๋ถ„ํ•œ ์ดํ•ด๊ฐ€ ํ•„์ˆ˜์ ์ด๋‹ค. ๊ณ„๋ฉด ์ ‘ํ•ฉ ํŠน์„ฑ์— ์˜ํ–ฅ์„ ๋ฏธ์น˜๋Š” ์š”์ธ์€ ์ผ๋ฐ˜์ ์œผ๋กœ ํ”Œ๋ผ์Šคํ‹ฑ์˜ ์ ๋„ (์ –์Œ์„ฑ), ๊ธฐํŒ์˜ ํ‘œ๋ฉด ์กฐ๋„, ๋ฌผ๋ฆฌ์  ๋ฐ ํ™”ํ•™์  ์ƒํ˜ธ ์ž‘์šฉ์˜ ๋„ค ๊ฐ€์ง€ ์œ ํ˜•์œผ๋กœ ๋ถ„๋ฅ˜๋œ๋‹ค. ์ด๋Ÿฌํ•œ ์š”์ธ๋“ค ์ค‘, ํ”Œ๋ผ์Šคํ‹ฑ์˜ ์ –์Œ์„ฑ๊ณผ ๊ธฐํŒ์˜ ํ‘œ๋ฉด ์กฐ๋„์— ์˜ํ•œ ์˜ํ–ฅ์€ ๋ณตํ•ฉ ์žฌ๋ฃŒ์˜ ์ œ์ž‘ ๋ฐฉ์‹ ์„ ์ •์„ ํ†ตํ•˜์—ฌ ์šฉ์ดํ•˜๊ฒŒ ์กฐ์ ˆ ๊ฐ€๋Šฅํ•˜๋‹ค. ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์—ด ์••์ฐฉ ๊ณต์ •์„ ํ†ตํ•˜์—ฌ ํ”Œ๋ผ์Šคํ‹ฑ์„ ๊ฐ•ํŒ ํ‘œ๋ฉด ์š”์ฒ  ๋‚ด ์™„์ „ํžˆ ํก์ฐฉ์‹œ์ผœ ๊ณ„๋ฉด ์ ‘ํ•ฉ๋ ฅ์„ ํ–ฅ์ƒ์‹œ์ผฐ์œผ๋ฉฐ, ๊ฐ•ํŒ ๋ฐ ํ”Œ๋ผ์Šคํ‹ฑ์˜ ํ‘œ๋ฉด ์ฒ˜๋ฆฌ ํ˜น์€ ๊ฐœ์งˆ์„ ํ†ตํ•˜์—ฌ ๊ณ„๋ฉด๊ฐ„ ๋ฌผ๋ฆฌ์ , ํ™”ํ•™์  ์ƒํ˜ธ ์ž‘์šฉ์„ ์ฆ์ง„ํ•˜์˜€๋‹ค. ๋ณธ ์—ฐ๊ตฌ์˜ 2๋‹จ์›์—์„œ๋Š” ๊ณ„๋ฉด ์ ‘ํ•ฉ ํŠน์„ฑ ํ–ฅ์ƒ์„ ์œ„ํ•˜์—ฌ ํ”Œ๋ผ์Šคํ‹ฑ ํ‘œ๋ฉด์˜ ๋ฌผ๋ฆฌ์ , ํ™”ํ•™์  ๊ฐœ์งˆ์„ ์ง„ํ–‰ํ•˜์˜€๋‹ค. ํ”Œ๋ผ์Šคํ‹ฑ ํ‘œ๋ฉด ํ™”ํ•™์˜ ์กฐ์ ˆ์„ ์œ„ํ•œ ์ž์™ธ์„ /์˜ค์กด ์ฒ˜๋ฆฌ ํ˜น์€ ์ฃผ ์‚ฌ์Šฌ ๋‚ด ๊ทน์„ฑ ์ž‘์šฉ๊ธฐ๊ฐ€ ๋„์ž…๋œ ๊ณต์ค‘ํ•ฉ์ฒด ์ธต์˜ ๋„์ž… ์ „๋žต์„ ์ฑ„ํƒํ•˜์˜€๋‹ค. ๋‘ ์ „๋žต ๋ชจ๋‘์—์„œ ์ ‘ํ•ฉ ํŠน์„ฑ์ด ํฌ๊ฒŒ ์ฆ๊ฐ€ํ•˜์˜€์œผ๋ฉฐ, ์ด๋Ÿฌํ•œ ์ „๋žต์„ ๊ธฐ๋ฐ˜์œผ๋กœ ํ›„์† ์—ฐ๊ตฌ๋ฅผ ์ง„ํ–‰ํ•˜์˜€๋‹ค. 3๋‹จ์›์—์„œ๋Š” ์—ด ์••์ฐฉ ๊ณต์ •๊ฐ„ ํ™”ํ•™์  ๊ณต์œ  ๊ฒฐํ•ฉ ํ˜•์„ฑ์ด ๊ฐ€๋Šฅํ•œ ๋ฐ˜์‘์„ฑ ์ž‘์šฉ๊ธฐ๋ฅผ ๊ฐ•ํŒ๊ณผ ํ”Œ๋ผ์Šคํ‹ฑ ํ‘œ๋ฉด์— ๊ฐ๊ฐ ๋„์ž…ํ•˜์—ฌ ์ ‘ํ•ฉ ํŠน์„ฑ ํ–ฅ์ƒ์„ ์œ ๋„ํ•˜์˜€๋‹ค. ๋ฐ˜์‘์„ฑ ์ž‘์šฉ๊ธฐ๋กœ๋Š” 1์ฐจ ์•„๋ฏผ๊ณผ, ๋ง๋ ˆ์‚ฐ ๋ฌด์ˆ˜๋ฌผ์„ ์ ์šฉํ•˜์˜€์œผ๋ฉฐ, ์„ ์ •ํ•œ ๋ชจ๋“  ํ”Œ๋ผ์Šคํ‹ฑ ํ›„๋ณด๊ตฐ์—์„œ ์ ‘ํ•ฉ ํŠน์„ฑ์ด ํฌ๊ฒŒ ํ–ฅ์ƒ๋จ์„ ํ™•์ธํ•˜์˜€๋‹ค. ์ ‘ํ•ฉ ํŠน์„ฑ ํ–ฅ์ƒ์˜ ์›์ธ์œผ๋กœ ์ถ”์ •๋˜๋Š” ์„ธ ๊ฐ€์ง€ ์œ ํ˜•์˜ ๋ฉ”์ปค๋‹ˆ์ฆ˜์„ ์ œ์•ˆํ•˜์˜€์œผ๋ฉฐ ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์ด๋ฅผ ๋ถ„์ž ์ ‘ํ•ฉ์ด๋ผ๊ณ  ๋ช…๋ช…ํ•˜์˜€๋‹ค. 4๋‹จ์›์—์„œ๋Š” ๊ฐ•ํŒ/ํ”Œ๋ผ์Šคํ‹ฑ ๋ณตํ•ฉ ์žฌ๋ฃŒ์˜ ์‚ฐ์—…์  ์‘์šฉ ๊ฐ€๋Šฅ์„ฑ์„ ํ–ฅ์ƒ์‹œํ‚ค๊ณ ์ž, ๊ณต์ • ๋‹จ์ˆœํ™”์™€ ์šฉ์ ‘์ด ๊ฐ€๋Šฅํ•œ ๋ณตํ•ฉ ์žฌ๋ฃŒ ๊ฐœ๋ฐœ์„ ๋™์‹œ์— ์ง„ํ–‰ํ•˜์˜€๋‹ค. ์—ฐ๊ตฌ ์ง„ํ–‰ ๊ณผ์ •์—์„œ ๋†’์€ ์ ‘ํ•ฉ ํŠน์„ฑ๊ณผ ์‘์ง‘๋ ฅ์„ ๋‚˜ํƒ€๋‚ธ ์นด๋ณด๋‹ ์ž‘์šฉ๊ธฐ ํ•จ์œ  ํ”Œ๋ผ์Šคํ‹ฑ ํ›„๋ณด๊ตฐ๋“ค์˜ ๋น„๊ต ํ‰๊ฐ€๋ฅผ ํ†ตํ•˜์—ฌ, ํ‘œ๋ฉด ๊ฐœ์งˆ ์—†์ด๋„ ๋ถ„์ž ์ ‘ํ•ฉ์„ ํ†ตํ•œ ๋†’์€ ์ ‘ํ•ฉ ํŠน์„ฑ ๋ฐœํ˜„์ด ๊ฐ€๋Šฅํ•œ ํด๋ฆฌ์ผ€ํ†ค์ด ์ตœ์  ํ”Œ๋ผ์Šคํ‹ฑ์œผ๋กœ ์„ ๋ณ„๋˜์—ˆ๋‹ค. ๊ฐ•ํŒ์˜ ๊ฒฝ์šฐ, 90 % ์ด์ƒ์˜ ์ ‘ํ•ฉ ํŠน์„ฑ์„ ์œ ์ง€ํ•˜๋ฉด์„œ 80 % ์ด์ƒ ํ‘œ๋ฉด ์ฒ˜๋ฆฌ ์‹œ๊ฐ„์„ ๋‹จ์ถ•ํ•˜์˜€๋‹ค. ๋˜ํ•œ, ์Šˆํผ์—”์ง€๋‹ˆ์–ด๋ง ํ”Œ๋ผ์Šคํ‹ฑ์ธ PEEK๋ฅผ ํ”Œ๋ผ์Šคํ‹ฑ ์ฝ”์–ด์ธต์œผ๋กœ ํ™œ์šฉํ•˜์—ฌ ๊ณ  ์ ‘ํ•ฉํŠน์„ฑ ๋ฐ ๋‚ด์—ด์„ฑ์„ ๊ฐ€์ง€๋Š” ๋ณตํ•ฉ ์žฌ๋ฃŒ๋ฅผ ๊ฐœ๋ฐœํ•˜์˜€๋‹ค. ์ตœ์ข…์ ์œผ๋กœ, ๊ธฐ๊ณ„ํ™”ํ•™์„ ํ†ตํ•˜์—ฌ ์ „๋„์„ฑ ํ•„๋Ÿฌ๋ฅผ ํ”Œ๋ผ์Šคํ‹ฑ ํ‘œ๋ฉด์— ํก์ฐฉ์‹œ์ผฐ์œผ๋ฉฐ, ์ด์™€ ๊ฐ•์„ฌ์œ  ๋ฉ”์‰ฌ์˜ ๋ณตํ•ฉ ํ™œ์šฉ์„ ํ†ตํ•˜์—ฌ ์šฉ์ ‘์ด ๊ฐ€๋Šฅํ•œ ๋ณตํ•ฉ ์žฌ๋ฃŒ๋ฅผ ๊ฐœ๋ฐœํ•˜์˜€๋‹ค. ๋ณธ ์—ฐ๊ตฌ์—์„œ ๊ฐœ๋ฐœ๋œ ๋ถ„์ž ์ ‘ํ•ฉ์„ ๊ธฐ๋ฐ˜์œผ๋กœ ํ•œ ๊ณ  ์ ‘ํ•ฉ ํŠน์„ฑ์˜ ๊ฐ•ํŒ/ํ”Œ๋ผ์Šคํ‹ฑ ๋ณตํ•ฉ ์žฌ๋ฃŒ๋Š” ๊ฒฝ๋Ÿ‰ํ™”๋ฅผ ์š”ํ•˜๋Š” ๋‹ค์–‘ํ•œ ์‚ฐ์—… ๋ถ„์•ผ์— ์‘์šฉ ๊ฐ€๋Šฅํ•œ ์ถฉ๋ถ„ํ•œ ์ž ์žฌ๋ ฅ์„ ๋ณด์œ ํ•˜๊ณ  ์žˆ๋‹ค๊ณ  ํŒ๋‹จ๋œ๋‹ค.Steel/plastic composites (SPCs) have attracted much attention for a long time since they display multifunctional characteristics such as thermal insulation, reduction in noise, vibration, and harshness (NVH) as well as multifarious advantages of high rigidity, fatigue resistance, and impact resistance while significantly reducing their weight. These advantages increase the demand for the employment of SPCs, especially in the automobile industry where weight reduction is an urgently leading issue during the period of energy crisis. To the best of our knowledge, the commercially available SPC is the only Smartsteelยฎ developed by Material Sciences Corporation (US), and unfortunately, related researches are insufficient compared to the need for development. The most challenging key factor in the development of SPCs is the interfacial adhesion between steel and plastic. For an actual structural material, robust and sustainable adhesion is required. Conventional physical adhesion which permeates to the roughness of the substrate causes a deterioration in durability and applicability because of a decrease in interfacial adhesion due to external conditions such as temperature, humidity, and stress and also the occurrence of a peeling effect at the interface. Recently, several emerging techniques such as laser welding and direct bonding by injection molding have been developed for attaching steel and plastic. However, the wide application of these techniques is still thwarted because of their high cost and limitations in adopting various materials. For enhancing the interfacial adhesive properties, an impeccable understanding of the steel/plastic interface is essential. Factors that affect the interfacial adhesion are generally classified into four types: the viscosity (wettability) of plastic, the surface roughness of the substrate, and physical /chemical interaction. Among those factors, the viscosity (wettability) of plastic and surface roughness can be easily handled by the manufacturing method. Interfacial adhesion is enhanced by completely adsorbing plastic onto the surface roughness of steel via the hot-press process. Besides, physical and chemical interaction at the interface is mostly improved through surface treatment or modification of each substrate. In chapter 2, chemical and physical modification of the plastic surface was conducted to improve interfacial adhesion between steel and plastic. Physico-chemical treatment of the plastic surface and the introduction of a copolymer layer which has a polar functional group on the main chain of plastic were adopted for modifying the surface chemistry. The adhesion strength was greatly increased in both strategies, and these strategies were developed further for follow-up study. In chapter 3, for improving the interfacial adhesion between the steel and the plastic, functional groups capable of forming a covalent bond under the hot-press process were introduced onto both surfaces of the steel plate and the plastic film. The primary amine and maleic anhydride were applied as reactive functional groups. The adhesion strength was significantly enhanced in all plastic candidates. Three types of presumable adhesion mechanisms were proposed called molecular adhesion in this study. In chapter 4, both process simplification and development of weldable SPCs were conducted for improving the industrial applicability of SPCs. Carbonyl-containing plastic candidates were examined and polyketone which exhibited high adhesive properties via molecular adhesion without surface modification was singled out. The processing time of the steel surface was also effectively reduced by more than 80 % while maintaining adhesive properties above 90 %. Moreover, SPC with remarkably high adhesive properties and thermal resistance was developed using polyetheretherketone as the plastic core layer. The conductive fillers were embedded in the plastic surface through mechano-chemistry, and the steel fiber mesh was also adopted for the development of weldable SPCs. In summary, we believe that SPCs with molecular adhesion have sufficient potential to be applied in various industrial fields requiring weight reduction.Chapter1. Introduction 1 1.1. Steel/Plastic Composites for Weight Reduction 2 1.2. Interfacial Adhesion 4 1.3. State-of-The-Art in Adhesion Techniques for SPCs 11 1.4. Research Objectives 14 1.5. References 18 Chapter2. Chemical/Physical Modification of Plastic Surface and Understanding Adhesive Properties Between Steel and Plastic 22 2.1. Introduction 23 2.2. Experimental 27 2.3. Results and Discussion 34 2.4. Conclusion 46 2.5. References 47 Chapter3. Development of Interface Treatment to Enhance Adhesive Properties in Steel/Plastic Composites 49 3.1. Introduction 50 3.2. Experimental 54 3.3. Results and Discussion 61 3.4. Conclusion 81 3.5. References 82 Chapter4. Development of Steel/Plastic Composites with High Adhesive Properties and Industrial Applicability via Molecular Adhesion 84 4.1. Introduction 85 4.2. Experimental 89 4.3. Results and Discussion 97 4.4. Conclusion 119 4.5. References 120๋ฐ•

    A proposed system for displaying accessing techniques to library users in the field of metallurgy

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    The system described here, if properly implemented, might be used to help student engineers teach themselves how to access an information store, such as a library, and how to specify a search request

    Contingency plans for chromium utilization. Publication NMAB-335

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    The United States depends entirely on foreign sources for the critical material, chromium, making it very vulnerable to supply disruptions. The effectiveness of programs such as stockpiling, conservation, and research and development for substitutes to reduce the impact of disruption of imports of chromite and ferrochromium are discussed. Alternatives for decreasing chromium consumption also are identified for chromium-containing materials in the areas of design, processing, and substitution
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