Vacuum Plasma Spray Forming of High Temperature Silicides

1993 ◽  
Vol 322 ◽  
Author(s):  
S. Sampath ◽  
H. Herman
Keyword(s):  
High Temperature ◽  
Plasma Spray ◽  
Molybdenum Disilicide ◽  
Spray Forming ◽  
Vacuum Plasma Spray ◽  
Plasma Spray Forming ◽  
Fine Grained ◽  
Vacuum Plasma ◽  
Near Net Shape ◽  
Relationship Of

AbstractMolybdenum disilicide and its composites have been fabricated by a number of researchers in recent years through vacuum plasma spray (VPS) forming. VPS is capable of producing dense, fine grained deposits of these high temperature intermetallics and is a promising technique for near-net-shape manufacturing. Reviewed here is VPS forming of high temperature silicide intermetallics, principally Mosi2 and its composites. A discussion will be given of the processing-structure-properties relationship of the spray formed silicide.

Study of TLP bonding of Ti-6Al-4V alloy produced by vacuum plasma spray forming and forging

2017 ◽  
Vol 121 ◽  
pp. 355-366 ◽  
Author(s):  
Akbar Davoodi Jamaloei ◽  
Hamid Reza Salimijazi ◽  
Hossein Edris ◽  
Javad Mostaghimi
Keyword(s):  
Plasma Spray ◽  
Spray Forming ◽  
Vacuum Plasma Spray ◽  
Plasma Spray Forming ◽  
Vacuum Plasma ◽  
Tlp Bonding

Microstructure and tensile properties of L12—Type NiCrAl alloy prepared by vacuum plasma spray forming

1995 ◽  
Vol 33 (7) ◽  
pp. 1159-1162 ◽  
Author(s):  
R. Tiwari ◽  
S. Sampath ◽  
B. Gudmundsson ◽  
G. Halada ◽  
C.R. Clayton ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Plasma Spray ◽  
Spray Forming ◽  
Al Alloy ◽  
Vacuum Plasma Spray ◽  
Plasma Spray Forming ◽  
Vacuum Plasma

Vacuum plasma spray forming of refractory metals and ceramics for space furnace containment cartridges—an extended abstract

1995 ◽  
Vol 4 (2) ◽  
pp. 143-144
Author(s):  
T. McKechnie ◽  
P. Krotz ◽  
Y. K. Liaw ◽  
R. M. Poortnan ◽  
F. Zimmerman ◽  
...  
Keyword(s):  
Plasma Spray ◽  
Spray Forming ◽  
Refractory Metals ◽  
Vacuum Plasma Spray ◽  
Plasma Spray Forming ◽  
Vacuum Plasma

The Implementation of Spray Forming for High Temperature Casing Applications

2001 ◽  
Author(s):  
Alan Partridge ◽  
Michael B. Henderson ◽  
David G. Cole ◽  
Paul Andrews
Keyword(s):  
High Temperature ◽  
Hot Isostatic Pressing ◽  
Spray Forming ◽  
Ring Rolling ◽  
Lead Times ◽  
Forming Process ◽  
Fine Grained ◽  
Near Net Shape ◽  
Property Assessment ◽  
Processing Steps

Many current gas turbine casings are manufactured using conventional wrought processing routes. Although well established this approach often requires numerous and complex processing steps. This can result in relatively long component lead times and high part costs. In an attempt to reduce lead times and cost the production of parts using the spray-forming process is under consideration. In the spray forming process the material is deposited from the molten state to produce a near net shape ring. The deposited ring is then subject to hot isostatic pressing (HIP) and/or ring rolling to consolidate the material and expand the ring to the required size. The material thus produced is usually relatively fine grained and can have a different balance of properties compared to conventionally processed alloys. However, the major advantage is that cost reductions can be achieved through the elimination of many process steps. In the current work a high temperature nickel alloy, RS5, has been produced as a spray formed ring. The influence of HIP and ring rolling have been investigated and a detailed microstructure-mechanical property assessment of the material has been carried out. The results of this work will be reported and the implications of the work on cost and manufacturing issues will be discussed.

Vacuum Plasma Spray Forming of Tungsten Base Functionally Gradient Composites

1996 ◽  
Author(s):  
M.R. Kim ◽  
R.W. Smith ◽  
D. Kapoor
Keyword(s):  
Plasma Spray ◽  
Plasma Deposition ◽  
Spray Deposition ◽  
Microstructural Characterization ◽  
Spray Forming ◽  
Vacuum Plasma Spray ◽  
Matrix Composites ◽  
Vacuum Plasma ◽  
Functionally Gradient ◽  
Tungsten Steel

Abstract Functionally gradient composites were spray formed via vacuum plasma spray deposition using tungsten cylindrical substrates. Materials deposited included tungsten-hafnium alloys and M-2 tool steel. Some deposits included micro-laminate layering with hafiiium alloys sprayed within the tungsten-hafnium matrix. Vacuum plasma deposition was shown to provide a viable means of producing functionally gradient composites from tungsten base materials. This was determined both by microstructural characterization of deposit structures and by measuring the compressive properties of the materials. Compression testing of the W-Hf matrix composites demonstrated compression strength of 1,552 MPa (225 ksi). Compression strengths of the tungsten/steel composite averaged 1,068 MPa (155 ksi). Failure of the W-Hf samples occurred via fracture of the tungsten/hafnium matrix whereas the tungsten/steel composites failed within the wrought tungsten core.

Consolidation and Mechanical Properties of Near-Net-Shape Al-21 wt.% Si Component Fabricated by Plasma Spray Forming

2007 ◽  
Vol 119 ◽  
pp. 183-186 ◽  
Author(s):  
Soon Jik Hong ◽  
S. Patil ◽  
Chang Kyu Rhee ◽  
S. Seal
Keyword(s):  
Mechanical Properties ◽  
Plasma Spray ◽  
Room Temperature ◽  
Spray Forming ◽  
Homogeneous Distribution ◽  
Cast Material ◽  
Plasma Spray Forming ◽  
Fine Microstructure ◽  
Near Net Shape ◽  
Increased Strength

The microstructure and mechanical properties of Al-21 wt% Si components fabricated by plasma spray forming are analyzed. The microstructure of the plasma spry formed component showed a homogeneous distribution of fine Si particles embedded in the Al matrix. The grain size of α-Al varied between 200 to 500 nm and the size of the Si particles was about 50 to 100 nm in the plasma spray formed component. The room temperature tensile strength of the plasma spray formed component was 215 MPa with 0.5 % elongation, while for cast material, it was 130 MPa. Despite the porosities, the ultra-fine microstructure and homogeneous distribution of Si particles embedded in matrix are the foundation of the increased strength of the plasma spry formed component.

scholarly journals Near-Net-Shape Tungsten–Rhenium Alloy Parts Produced by Plasma Spray Forming and Hot Isostatic Pressing

2014 ◽  
Vol 55 (4) ◽  
pp. 713-721 ◽  
Author(s):  
Yueming Wang ◽  
Xiang Xiong ◽  
Weizhong Zhao ◽  
Lu Xie ◽  
Jianhui Yan ◽  
...  
Keyword(s):  
Plasma Spray ◽  
Hot Isostatic Pressing ◽  
Spray Forming ◽  
Plasma Spray Forming ◽  
Isostatic Pressing ◽  
Near Net Shape ◽  
Rhenium Alloy
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