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powder-binder feedstock

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Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005503
EISBN: 978-1-62708-197-9
... for powder injection molding, because inertia, thermal conductivity, and powder-binder separation are new concerns with PIM feedstock. The feedstock enters the barrel as cold granules, and during compression to remove trapped air, it is heated above the binder melting temperature. Because the feedstock...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006141
EISBN: 978-1-62708-175-7
...Abstract Abstract This article describes part selection, feedstock (powders and binders) characteristics and properties, tool design, and material and tooling for fabrication of metal powder injection molding (MIM) machines. It discusses the process parameters, operation sequence, molding...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006021
EISBN: 978-1-62708-175-7
...Abstract Abstract This article discusses the process details of metal powder injection molding of microcomponents and the powder particle characteristics of feedstock and property requirements of binders. It reviews important characteristics to be considered in the processing steps: venting...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006571
EISBN: 978-1-62708-290-7
...Abstract Abstract The highly irregular morphologies of ceramic powder particles due to their process history present a challenge to binder jetting additive manufacturing (BJ-AM) ceramic powder feedstock processability, but knowledge of powder metallurgy of ceramics benefits the development...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006555
EISBN: 978-1-62708-290-7
... is for the droplet to wet and bind powder particles rapidly and locally without splatting or otherwise dispersing on impact. The deposition rate, adhesive droplet size, droplet velocity, and binding mechanism all impact part quality. Fig. 17 Schematic of binder jetting As long as the powder feedstock...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005727
EISBN: 978-1-62708-171-9
... powders, namely, crushing, milling, attriting, and machining. The article describes two prime methods of agglomeration. One method uses a binder by way of agglutination, while the other relies on a sintering operation. The article discusses the technology and principles of the processes that relate...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006579
EISBN: 978-1-62708-290-7
... and composition of the feedstock powder. Post-HIP microstructures exhibit an equiaxed structure, minimal grain growth, and the presence of annealing twins. Density and purity are limited by impurities originating from both the feedstock powder used and the residual ash products associated with binder burnout...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006569
EISBN: 978-1-62708-290-7
... printing sintering ENCOMPASSED IN THE FIELD of additive manufacturing (AM) is a variety of layer-wise manufacturing machines that use a wide range of feedstock, deposition, and densification technologies ( Ref 1 ). Unlike the well-known laser technologies, binder jetting is a powder bed-based...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006583
EISBN: 978-1-62708-290-7
... feedstock, a suspension of WC-Co powder in a polymeric binder of high viscosity, can be in the form of filaments (FFF), rods (BMD), or pellets (CEM). After printing, the parts are further processed to remove the binder by solvent and thermal debinding prior to sintering. A shrinkage of 21 to 23% is observed...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... considerations, and quality assurance. The emphasis is on the design and metallurgical aspects for the two main types of metal AM processes: powder-bed fusion (PBF) and directed-energy deposition (DED). The article also describes the processes involved in binder jet sintering, provides information on the design...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006053
EISBN: 978-1-62708-175-7
..., and injection molding. Processes such as uniaxial pressing and CIP are performed using powders directly from spray drying or vacuum drying, whereas processes such as extrusion and injection molding require addition of binders after drying. The goal of green shaping is to form dry powder into desired shapes...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006122
EISBN: 978-1-62708-175-7
... tends to be on the order of 0.5%, but may be as high as 1.75% for low alloy steels. Hard Metals Fine cobalt powder is the most widely used binder in tungsten carbide (WC) base hard metals due to its outstanding wetting and adhesion characteristics. About 90% of WC hard metals use cobalt binders...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.9781627082907
EISBN: 978-1-62708-290-7
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006582
EISBN: 978-1-62708-290-7
... binder burnout, the residual carbon transferred to the material is at highly elevated levels compared to the starting feedstock powder and results in terminating the solidification products in carbides. Carbon-lean samples (larger powder particles) result in formation of Laves phase and δ. Commercial...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006576
EISBN: 978-1-62708-290-7
...Abstract Abstract This article provides a brief overview of additive manufacturing (AM) of tool steels via various AM technologies such as laser powder bed fusion, electron powder bed fusion, blown powder directed energy deposition, and binder jet AM. The discussion includes process overview...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006562
EISBN: 978-1-62708-290-7
... (3D) ceramic components, including binder jetting ( Ref 1 ), material extrusion ( Ref 2 – 6 ), vat photopolymerization ( Ref 7 – 10 ), powder bed fusion ( Ref 11 , 12 ), and directed energy deposition ( Ref 13 – 16 ). All of these techniques involve adding ceramic materials layer by layer...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006557
EISBN: 978-1-62708-290-7
... of the most critical steps in the powder metal industry. Defects can be produced by inadequate debinding, such as bloating, blistering, surface cracking, and large internal voids. Binder burnout depends on the internal structure of the green body and has the tendency to lead to structural change, where...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006561
EISBN: 978-1-62708-290-7
..., or 2100 °F) homogenization followed by solution treatment and aging produced a more complete equiaxed microstructure ( Ref 9 ). Sintering The BJ AM process does not involve melting and cooling, but instead uses two materials (metal powder and binder) to build the part. The binding agent, typically...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006573
EISBN: 978-1-62708-290-7
... similar (~53%), whereas the fine powder showed tap and green part density values of ~53 and 47%, respectively. The difference between the tap density and green density for the fine powder could be related to tendency of fine powder to agglomerate during binder jetting ( Ref 45 , 46 ). Using fine powder...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006418
EISBN: 978-1-62708-192-4
... are produced by combining WC with cobalt or nickel binder and, depending on the application, varying amounts of TaC/TiC/NbC/VC. Grade powder is milled in conventional ball mills, attritor mills, and vibratory mills, which reduces the particle size of the raw materials and provides mixture uniformity. Milling...