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Home > Fabrication of Al-Cnts Mmc by Induction Melting With Improved Dispersion and Wetting of Cnts in Al Matrix Using a Multifunctional Flux

Fabrication of Al-Cnts Mmc by Induction Melting With Improved Dispersion and Wetting of Cnts in Al Matrix Using a Multifunctional Flux

Thesis Info

Access Option

External Link

Author

Mansoor, Muhammad

Program

PhD

Institute

National University of Sciences & Technology

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

2015

Thesis Completion Status

Completed

Subject

Applied Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/7626/1/M.%20Mansor%20Full%20Thesis.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726189382

Similar


Aluminum/carbon nanotubes (Al-CNTs) composite is an encouraging candidate material for aerospace applications due to its expected high strength-to-weight ratio. Carbon nanotubes (CNTs) offer remarkable reinforcements owing to their high specific strength and specific modulus. However, uniform dispersion and wetting of the CNTs is extremely difficult in molten aluminum, due to large difference in surface tension forces of the two components. In present work, the dispersion issue was improved using induction melting technique, where innate stirring action of induction melting dispersed the nanotubes in molten aluminum. The wetting was improved using a multifunction flux (titanate of potassium), which, when was incorporated in molten mixture of aluminum and CNTs having, instigated in-situ reactions to form titanium carbides on the surface of the nanotubes causing increased wetting of CNTs by molten aluminum. The composites were characterized using scanning electron microscopy, x-ray diffraction, transmission electron microscopy and mechanical testing. Refinement in crystallite size was achieved down to ~150 nm and a corresponding increase in lattice strain up to ~3.46x10-3 was observed in the composites. A simultaneous increase in v i yield strength ~208 %, tensile strength ~218 %, and hardness ~100 % was observed. However, the decrease in the ductility of the composite associated with the strengthening of the matrix was <25 %. Additionally, stress relaxation behavior of the annealed composite was improved by ~30 % compared with pure aluminum. Consequently, the stress relaxation rate of the composite was decreased even beyond the yield strength of the annealed pure aluminum. Therefore, induction melting and usage of the flux for improvement in the dispersion and wetting of the nanotubes, respectively, appeared to be a potential method to fabricate Al-CNTs composites.
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فیض احمد فیض کی شاعری کا تنقیدی جائزہ

فیض احمد فیض کی شاعری کا تنقیدی جائزہ
فیض احمد فیض غالب اور اقبال کے بعد اردو کے سب سے عظیم شاعر ہیں۔ آپ تقسیمِ ہند سے پہلے ۱۹۱۱ء میں سیالکوٹ میں پیدا ہوئے۔ آپ انجمن ترقی پسند مصنفین تحریک کے فعال رکن اور ایک ممتاز اِشتراکیت سٹالنسٹ فکر کے کمیونسٹ تھے۔
فیض شاعری میں ایک نئی روایت کے علمبردار وہ ترقی پسند تحریک کے بانیوں میں سے ہیں مگر ان کے ہاں دیگر ترقی پسندوں کی طرح تلخی نہیں ہے۔ انہوں نے مروجہ الفاظ کو نہایت فنکارانہ انداز میں معنی عطا کیے اور غزل کی معروف روایات کو اپنے نصب العین کے مفاہیم کے ساتھ بیان کیا۔
بچپن:
فیض۱۳ فروری ۱۹۱۱ء کو کالا قادر، ضلع نارووال، پنجاب، برطانوی ہند میں ایک معزز سیالکوٹی گھرانے میں پیدا ہوئے۔۱۹۲۱ئمیں آپ نے سکاچ مشن اسکول سیالکوٹ میں داخلہ لیا اور یہاں میٹرک تک تعلیم حاصل کی۔ میٹرک کے امتحانات کے بعد آپ نے ایف اے کا امتحان مرے کالج سیالکوٹ سے پاس کیا۔ آپ نے اسکول میں فارسی اور عربی زبان سیکھی۔بی اے آپ نے گورنمنٹ کالج لاہور سے کیا اور پھر وہیں سے ۱۹۳۲ئمیں انگریزی میں ایم اے کیا۔ بعد میں اورینٹل کالج لاہور سے عربی میں بھی ایم اے کیا۔
ترقی پسند تحریک کا قیام:
۱۹۳۵ء میں آپ نے محمڈن اینگلو اورینٹل کالج، امرتسر میں انگریزی و برطانوی ادب کے لیکچرر کی حیثیت سے ملازمت کی؛ اور پھر ہیلے کالج لاہور میں۔ آپ نے ۱۹۳۶ئمیں سجاد ظہیر اور صاحبزادہ محمودالظفر کے ساتھ مل کر انجمن ترقی پسند مصنفین تحریک کی بنیاد ڈالی۔
شاعری کے مجموعے:
• نقش فریادی • دست صبا
• زنداں نامہ • دست تہ سنگ
• سر وادی سینا • شام شہر یاراں
• مرے دل مرے مسافر • نسخہ ہائے وفا (کلیات)
فیض ناقدین کی نظر میں:
معروف نقاد پروفیسر آل احمد سرور...

RESILIENCE AS A MEDIATOR IN RELATIONSHIP BETWEEN ANXIETY AND PERSONALITY AMONG PHYSIOTHERAPISTS-A CROSS-SECTIONAL STUDY

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Role of Culture and Macroeconomic Shocks in Driving Herding Behavior: Evidence from Developed, Emerging and Frontier Stock Markets

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