Effect of Polyvinylpyrrolidone Content on Pure Titanium Injection Molding

In water-soluble binder systems, polyethylene glycol (PEG) and polymethylmethacrylate (PMMA) are often used as primary and secondary components. The PEG/PMMA binder system is clean and environmentally friendly, but the discrepancy between the crystallization temperature of PEG and the glass transiti...

Full description

Saved in:
Bibliographic Details
Published in:Crystals (Basel) 2023-11, Vol.13 (11), p.1563
Main Authors: Zhang, Weichen, Li, Lu, Li, Chuanyong, Sun, Yanhua, Hayat, Muhammad Dilawer, Li, Yugeng, Chen, Gang, Yuan, Zhentao, Wang, Xiao
Format: Article
Language:English
Subjects:
Binder removal
Carbon
Crystallization
crystallization inhibitor
Glass transition temperature
Injection molding
Mechanical properties
metal injection molding
Metal powder products
Metal powders
morphology
Open channels
Polyethylene glycol
Polymers
Polymethyl methacrylate
Polymethylmethacrylate
Polyols
Polyvinylpyrrolidone
Porosity
Povidone
Powder metallurgy
Raw materials
Rheology
Sintering
Sintering (powder metallurgy)
Solidification
Spherical powders
Tensile strength
Titanium
water-soluble binder
Waxes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In water-soluble binder systems, polyethylene glycol (PEG) and polymethylmethacrylate (PMMA) are often used as primary and secondary components. The PEG/PMMA binder system is clean and environmentally friendly, but the discrepancy between the crystallization temperature of PEG and the glass transition temperature of PMMA leads to the generation of pores in the feedstock. The solidification pores have an adverse impact on the final mechanical properties of the samples. Polyvinylpyrrolidone (PVP), as a crystallization inhibitor, can inhibit the formation of porosity. In this study, spherical titanium powder with a diameter of less than 45 μm was used as metal powder; the binder system consisted of PEG, PMMA and SA. Different increments of PVP (0, 10%, 20%, 30 wt.%) were added to the PEG/PMMA binder system. The uniformity of the feedstock and the open channels generated after debinding were observed using SEM. The pores’ condition before and after debinding was studied using Micro CT, and the mechanical properties of the samples were also detected. By comparing the macroscopic and microscopic morphologies of the injected samples and mechanical properties of the sintered samples, it was found that a PVP content of 20 wt.% resulted in the best properties.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst13111563