استحکام بخشی شیشه‌های سودالایم با استفاده از روش تعویض یونی به کمک میدان الکتریکی

نوع مقاله : علمی و پژوهشی

نویسندگان

• امید بناپور غفاری
• امیررضا فدائی
• پوریا لطفی پور
• بیژن افتخاری یکتا

دانشکده مهندسی مواد و متالورژی دانشگاه علم و صنعت ایران

10.22067/jmme.2024.84990.1127

چکیده

تعویض یونی یکی از روش‌های استحکام بخشی شیشه‌ها می‌باشد که شامل وارد کردن شیشه حاوی محتوای قلیایی در یک حمام نمک مذاب (به عنوان مثال نیترات پتاسیم) می‌باشد. در این فرآیند یون کوچک‌تر از ساختار شیشه خارج شده و یون بزرگ‌تر وارد ساختار شیشه می‌شود. این فرآیند باعث ایجاد تنش فشاری در سطح می‌شود و در نتیجه استحکام را افزایش می‌دهد. با اعمال یک انرژی خارجی مانند میدان الکتریکی، می‌توان سرعت و راندمان فرآیند را افزایش داد. در تحقیق حاضر با استفاده از روش تعویض یونی به کمک میدان الکتریکی، به بررسی استحکام بخشی شیشه‌های سودالایم پرداخته شده است. در این پژوهش پارامترهای دما، زمان و میدان الکتریکی به هدف افزایش استحکام بررسی شدند. بیشترین استحکام، عدد سختی و بهترین شکست نگاری در نمونه‌ای مشاهده شد که تنها به مدت 10 دقیقه در دمای 400 درجه سانتی‌گراد در میدانی به شدت 2000 ولت بر سانتی‌متر قرار گرفت. مشاهده شد که استحکام نمونه‌ها به بیش از 4 برابر نسبت به نمونه‌ خام رسید. همچنین عدد سختی نمونه‌ها نیز از kgf/mm2 50±550 بهkgf/mm2 50±750 افزایش پیدا کرد. علاوه بر این عمق نفوذ برای نمونه‌ای که تنها به مدت 10 دقیقه در دمای 400 درجه سانتی‌گراد تحت میدانی به شدت 2000 ولت بر سانتی‌متر بوده است، به 11 میکرومتر رسیده است. قابل ذکر است برای نمونه‌هایی که تحت فرآیند تمپر شیمیایی بدون استفاده از میدان الکتریکی قرار گرفته‌اند، در شرایط دمایی 400درجه سانتی‌گراد به مدت 240 دقیقه عمق نفوذ 3 میکرومتر شد.

کلیدواژه‌ها

• استحکام بخشی شیشه
• تعویض یونی به کمک میدان الکتریکی
• خواص مکانیکی
• محاسبه تنش فشاری

موضوعات

• سرامیک

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عنوان مقاله [English]

Strengthening of soda-lime glasses using field-assisted ion exchange

نویسندگان [English]

• Omid Banapour Ghaffari
• Amirreza Fadaei
• Pouriya lotfipoor
• Bijan Eftekhari Yekta

School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Narmak, Tehran 1684613114, Iran.

چکیده [English]

The strength of glasses increases during an ion exchange experiment because of the significant surface compression that arises from the replacement of larger alkali ions into the smaller host alkali ion site. The application of an external energy source, such as an electric field, has the potential to enhance the efficiency of the ion exchange process. This study examines the enhancement of the mechanical strength of soda-lime glasses through the utilization of the electric field-assisted ion exchange technique. The objective of this study was to examine the effects of temperature, time, and electric field on enhancing the strength of the raw glasses. The sample exhibits the greatest strength and highest hardness number when subjected to a temperature of 400 °C and an electric field intensity of 2000 V/cm for a duration of 10 minutes. The results indicate that the samples exhibited a strength that exceeded four times the initial strength of the raw sample. Additionally, there was an observed increase in the hardness of the samples, with values ranging from 550±50 kgf/mm2 to 750±50 kgf/mm2. Furthermore, it has been observed that the case depth has attained a magnitude of 11 μm in specimens subjected to an electric field strength of 2000 V/cm for a mere duration of 10 minutes while being maintained at a temperature of 400 °C. Notably, in the absence of an electric field, the chemically tempered samples exhibit a depth of 3 micrometers at temperature settings of 400 °C for a duration of 240 minutes.

کلیدواژه‌ها [English]

• Strengthening of glass
• Electric field-assisted ion exchange
• Mechanical properties
• Calculation of compressive stress

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