Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 40 for “"isostatic pressing"”.
-
Investigating the Effects of Hot Isostatic Pressing on Additively Manufactured parts
L'abstract è presente nell'allegato / the abstract is in the attachment
-
Net-shape hot isostatic pressing of a nickel-based powder superalloy
… property assessment have been carried out on hot isostatically pressed (HIPped) and heat treated samples of RR 1000 powder to assess Net Shape HIPping as a process-route for aero engine components. HIPping led to (Hf,Zr)-rich oxides and carbides on prior particle boundaries (PPBs) which could be …
-
The Consolidation of Rapidly Solidified Particulate by Dynamic Compaction and Hot-Isostatic Pressing
… the relatively conventional technology of hot-isostatic pressing (HIP) in which dynamically consolidated pieces were subsequently HIP'd at low temperatures in a hybrid process termed DC-HIP.
-
Effects of Hot Isostatic Pressing on Copper Parts Additively Manufactured via Binder Jetting
… This work aims to investigate the effects of Hot Isostatic Pressing (HIP) as a secondary post-processing step on the densification of Binder Jet copper parts. By understanding the effects of HIP, the author attempts to create parts of near-full density, and subsequently to quantify the effects of …
-
Microstructural design of additively manufactured Nickel superalloys through hot isostatic pressing and heat treatment
L'abstract è presente nell'allegato / the abstract is in the attachment
-
Dynamic Compaction of Rapidly Solidified Nickel-Base Superalloys (Rapid Solidification, Powder Metallurgy, Hot Isostatic Pressing, Consolidation, Precipitation)
Rapid solidification of an experimental nickel-base superalloy was achieved using centrifugal atomization, chill-block melt-spinning and laser surface melting. Transmission electron microscopy was utilized to characterize the various microstructures obtained in terms of growth morphology, …
-
Processing and characterization of zinc sulfide based materials
… heat treatment at 800°C for 24 hours. After hot isostatic pressing, relative densities greater than 95% and ultra-fine microstructures with average grain sizes ranging 16-31 nm were achieved. Nanocomposites showed significant increase in hardness, as high as ~100%, compared to pure ZnS. Powders …
-
Development of SiC whisker/chopped SiC fiber reinforced (Ca<sub>0.6</sub>,Mg<sub>0.4</sub>)Zr₄(PO₄)₆ ceramic matrix composites
… were produced using a glass encapsulated hot isostatic pressing (HIPing) technique. The best HIPing temperature, pressure, and time conditions to optimize composite density and strength were determined to be 1050°C, 103 MPa, and 0.25 h.
-
Microstructural And Mechanical Characterization Of Al-al2o3 Nanocomposites Synthesized By High-energy Milling
… by (i) magnetic pulse compaction (MPC) (ii) hot-isostatic pressing (HIP), (iii) vaccum hot pressing (VHP), and (iv) a combination of vaccum hot pressing and hot-isostatic pressing (VHP+HIP). However, successful consolidation of the powders to near-full density was achieved only through VHP+HIP …
-
The Effect of Newer Methods of Processing on the Fatigue Strength of Cast Steel
The effect of hot isostatic pressing (HIP) and electrochemical machining (ECM) on the microstructure and mechanical properties of cast steel, particularly the fatigue strength, has been investigated.<br/><br/>It is shown that microporosity in cast steel reduces the elongation, reduction in area, …
-
HIPProzess für offen porösen Stahl X20Cr13
… salts as place holder powder. After hot isostatic pressing the powder metallurgical composite, the dummy material, which is used to finally yield the porosity in the composite, is be leached out. In different experiments the manufacturing parameters are established.
-
Nanocrystalline copper-tantalum composites
… hours and at 900 C for up to 10 hours and hot isostatic pressing (HIP) at 900 C for 1 hour and 172 MPa.
-
Solid State Synthesis of Bulk Amorphous Ni – 50AT% Ti Alloy
The mechanical alloying (MA) process and hot isostatic pressing (HIP) were used to synthesize bulk amorphous Ni-Ti alloy as an alternative to the traditional methods of casting multi-component metallic alloys. Samples milled cryogenically for 10 hours provided a homogeneous lamella structure with …
-
Processing and Properties of Amorphous NiW Reinforced Crystalline Ni Matrix Composites
… volume fractions and then consolidated using hot-isostatic pressing (HIP). This work reveals that the amorphous NiW reinforcement provides strength and hardness to the ductile Ni matrix while simultaneously maintaining a strong interfacial bond due to the similar chemistry of the two components. …
-
Preparation, microstructure and properties of silicon carbide-dysprosia composites
… (Dy$\sb2$O$\sb3$) were fabricated by hot pressing and hot isostatic pressing. Dy$\sb2$O$\sb3$, one of the lanthanide sesquioxides (or rare-earth oxides), undergoes a displacive (monoclinic to cubic) phase transformation with volume expansion during cooling from high temperatures …
-
Entwicklung und Erprobung eines porösen TiO 2-Glas-Verbundes als Knochenersatz
… granules ceramic shaping is performed by cold pressing. Extrusion and cold isostatic pressing were evaluated and discarded. Density gradients in axial and radial direction remain in the biphasic structure due to pressing and sintering. More than 60% total porosity are being characterised mainly …
-
Consolidation of Al-TiO₂ and Ti₃Al-Ai₂O₃ composite powders
Pressureless sintering, hot pressing and sinter-HIP of Ti₃Al-Al₂O₃ and Al-TiO₂ composite powders have been carried out under inert atmospheres. The Al-TiO₂ composite powders were produced by discus milling Al/TiO₂ powder mixtures followed by ball milling. The Ti₃Al-Al₂O₃ composite powders were …
-
Fabrication of 316-L stainless steel and composite micro machine components using softlithography and powder metallurgy process
… damage-free green micro components. A cold isostatic pressing technique is also adopted to improve the densities and linear shrinkages of the stainless steel green and sintered micro components. A new mixing method is used to improve the homogeneity of the ceramic inclusions in the stainless …
-
Catalytic properties, densification and mechanical properties of nanocrystalline yttria-zirconia-based materials
… under an argon atmosphere, followed by hot isostatic pressing at a temperature lower than the presintering temperature. The grain sizes of dense 3YZ and 8YZ ceramics were controlled between 100 nm and 5 glm. This allowed for the systematic study of 3YZ and 8YZ in indentation hardness, …
-
Powder Processing and Characterization of W-3Ni-1Fe Tungsten Heavy Alloy
Mechanical alloying, compaction by cold isostatic pressing, and pressureless sintering were used to study the potential for W â 3 wt% Ni â 1 wt% Fe to be processed into the bulk nanocrystalline form as a replacement material for depleted uranium in kinetic energy penetrators. Milling time and …
Page 1 of 2