การผลิตโฟมอะลูมิเนียมโดยใช้ลูกบอลเกลือที่ออกแบบเป็นตัวสร้างรูพรุน

• Main Author: จุฑานนท์ บุญประเสริฐ
• Other Authors: เสกศักดิ์ อัสวะวิสิทธิ์ชัย
• Format: Theses and Dissertations
• Language: Thai
• Published: จุฬาลงกรณ์มหาวิทยาลัย 2021
• Online Access: https://digiverse.chula.ac.th/Info/item/dc:41075
• Institution: Chulalongkorn University

The present research aims to study the manufacture of open-cell aluminium foams, using salt balls as space holder, and their mechanical properties. The study began with the production and properties of salt balls that have spherical shapes. The 5 mm diameter salt balls and ADC-12 aluminum alloy were selected to produce aluminum foams at temperatures of 650 and 700°C, under Ar gas pressures of 1 and 2 bar and infiltration times of 10 and 30 minutes.The result showed that the microstructure of salt balls, after sintering, was more homogeneous. This results in higher compressive strength of the salt balls.The present manufacturing technique can produce open-cell aluminium foams. The foam structure contained large pores, due to partial infiltration of aluminium melt in the workpiece, when was carried out at 650°C, 1 bar and 10 min. The microstructure of foam specimens composed of aluminium matrix with dispersed silicon phase. The compressive strength of foams depends on the temperature, pressure and time required for production. At 700°C, most specimens had higher yield strengths than the specimen at 650°C, as well as increasing pressures from 1 to 2 bar. The energy absorption also increased when the infiltration time was increased from 10 to 30 minutes.