Powder distribution on powder injection moulding of ceramic green compacts using thermogravimetric analysis and differential scanning calorimetry

TY - JOUR

T1 - Powder distribution on powder injection moulding of ceramic green compacts using thermogravimetric analysis and differential scanning calorimetry

AU - Poh, Leslie

AU - Della, Christian

AU - Ying, Shengjie

AU - Goh, Cindy

AU - Li, Yun

N1 - Publisher Copyright: © 2017

PY - 2018/4/1

Y1 - 2018/4/1

N2 - Powder-binder separation during injection moulding causes defects such as cracking, warpage or anisotropic shrinkage during firing. In this paper, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) have been previously used to analyse powder distribution within the green body for metal injection moulding are used for ceramics. TGA and DSC are used to characterize the mass loss and heat of fusion of the binder system, silicon nitride feedstock and test-bars. TGA can measure the volume fraction of powder in green parts directly with 1.76 vol% difference from nominal volume fraction and variations up to 0.177 vol%. The DSC empirical model predicted volume fraction of powder in green parts with 1.76 vol% difference from nominal volume fraction and variations up to 1.710 vol%. Using rule of mixture, it over predicted volume fraction of powder in green parts by 6.78 vol% from nominal volume fraction and with variations up to 2.510 vol%.

AB - Powder-binder separation during injection moulding causes defects such as cracking, warpage or anisotropic shrinkage during firing. In this paper, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) have been previously used to analyse powder distribution within the green body for metal injection moulding are used for ceramics. TGA and DSC are used to characterize the mass loss and heat of fusion of the binder system, silicon nitride feedstock and test-bars. TGA can measure the volume fraction of powder in green parts directly with 1.76 vol% difference from nominal volume fraction and variations up to 0.177 vol%. The DSC empirical model predicted volume fraction of powder in green parts with 1.76 vol% difference from nominal volume fraction and variations up to 1.710 vol%. Using rule of mixture, it over predicted volume fraction of powder in green parts by 6.78 vol% from nominal volume fraction and with variations up to 2.510 vol%.

KW - Differential scanning calorimetry (DSC)

KW - Powder injection moulding (PIM)

KW - Segregation

KW - Silicon nitride

KW - Thermogravimetric analysis (TGA)

UR - http://www.scopus.com/inward/record.url?scp=85041376937&partnerID=8YFLogxK

U2 - 10.1016/j.powtec.2017.12.078

DO - 10.1016/j.powtec.2017.12.078

M3 - 文章

AN - SCOPUS:85041376937

SN - 0032-5910

VL - 328

SP - 256

EP - 263

JO - Powder Technology

JF - Powder Technology

ER -