The effect of sintering temperature on wear resistance of alloys produced by using hot isostatic pressing method

2018 ◽  
Vol 25 (3) ◽  
pp. 477-485
Author(s):  
Tulay Yildiz ◽  
Keyword(s):  
Wear Resistance ◽  
Sintering Temperature ◽  
Hot Isostatic Pressing ◽  
Pressing Method ◽  
Isostatic Pressing

scholarly journals Ceramics Coating on Metal Surfaces by Hot Isostatic Pressing Method

1988 ◽  
Vol 96 (1115) ◽  
pp. 736-743 ◽  
Author(s):  
Kiichiro KAMATA ◽  
Hiroshi FUKUNAGA ◽  
Noriyuki HAYASHI ◽  
Isao TANABE ◽  
Kozo ISHIZAKI
Keyword(s):  
Metal Surfaces ◽  
Hot Isostatic Pressing ◽  
Pressing Method ◽  
Isostatic Pressing

Effect of Sintering Temperature on Structure and Dielectric Properties of Lead Free K0.5Na0.5NbO3 Prepared via Hot Isostatic Pressing

2017 ◽  
Vol 888 ◽  
pp. 42-46 ◽  
Author(s):  
Fatin Khairah Bahanurdin ◽  
Julie Juliewatty Mohamed ◽  
Zainal Arifin Ahmad
Keyword(s):  
Grain Size ◽  
Dielectric Properties ◽  
Room Temperature ◽  
Sintering Temperature ◽  
Hot Isostatic Pressing ◽  
Solid State Reaction Method ◽  
Lead Free ◽  
Tangent Loss ◽  
Isostatic Pressing ◽  
Tan Δ

In this research, alkaline niobate known as K0.5Na0.5NbO3 (KNN) lead-free piezoelectric ceramic was synthesis by solid state reaction method which pressing at different sintering temperatures (1000 °C and 1080 °C) prepared via hot isostatic pressing (HIP)). The effect of sintering temperature on structure and dielectric properties was studied. The optimum sintering temperature (at 1080 °C for 30 minutes) using hot isostatic pressing (HIP) was successfully increase the density, enlarge the particle grain size in the range of 0.3 µm – 2.5 µm and improves the dielectric properties of K0.5Na0.5NbO3 ceramics. The larger grain size and higher density ceramics body will contribute the good dielectric properties. At room temperature, the excellent relative permittivity and tangent loss recorded at 1 MHz (ɛr = 5517.35 and tan δ = 0.954), respectively for KNN1080HIP sample. The KNN1080HIP sample is also exhibits highest relative density which is 4.485 g/cm3. The ɛr depends upon density and in this work, the density increase as the sintering temperature increase, which resulting the corresponding ɛr value also increases.

High-Temperature Buckling Analysis of Titanium Cans Under External Pressure

1999 ◽  
Vol 121 (4) ◽  
pp. 364-368
Author(s):  
V. Koundy ◽  
C. Thiebaut
Keyword(s):  
Hot Isostatic Pressing ◽  
Shell Element ◽  
Element Model ◽  
External Pressure ◽  
Buckling Mode ◽  
Pressing Method ◽  
Isostatic Pressing ◽  
Powder Consolidation ◽  
Rupture Area ◽  
Numerical Finite Element

Powder metallurgy techniques are often used in the fabrication of finished and semi-finished articles. At the CEA, a cold followed by a hot isostatic pressing method is used to produce solid forms from various types of powder. Occasionally, during the hot isostatic pressing part of the process, buckling of the titanium envelope near to the sealed end leads to fracture of the can and incomplete powder consolidation. The aim of this paper is to investigate by numerical finite element simulation the fracture process. A 2-D shell element model with Fourier series taking into account plastic deformation of the can material has been considered and used to determine the buckling critical pressure and the corresponding buckling mode. The simulation has been used to eliminate failure of the can by modifying the temperature-pressure schedule or by changing the can design. The calculations show that reducing the sharp angles of the initial titanium can near the rupture area can resolve the buckling problem; however, this solution is not totally satisfactory due to the development of a zone of constriction (breaks and irregularities) in the compacted powder just behind the modified can wall. This geometrical defect leads to difficulties in machining the final product. A better solution to the problem is to increase the initial can temperature prior to application of the pressure. This leads to a can of enhanced ductility with a better ability to deform. This latter solution, which can be employed with or without can modifications, eliminates both the can’s buckling and the zone of constriction. These numerical results have been validated by recent tests performed in our laboratories.

Effect of Manufacturing Methods on Structure and Properties of the Gradient Tool Materials with the Non-Alloy Steel Matrix Reinforced with the HS6-5-2 Type High-Speed Steel

2007 ◽  
Vol 539-543 ◽  
pp. 2749-2754 ◽  
Author(s):  
A. Kloc ◽  
Leszek Adam Dobrzański ◽  
G. Matula ◽  
José M. Torralba
Keyword(s):  
Powder Metallurgy ◽  
Alloy Steel ◽  
High Speed ◽  
Sintering Temperature ◽  
High Speed Steel ◽  
Powder Metallurgy Method ◽  
Steel Matrix ◽  
Pressing Method ◽  
Isostatic Pressing ◽  
Test Pieces

Investigations carried out referred to obtaining material based on the high-speed steel and non-alloy steel. The conventional powder metallurgy method was used for manufacturing these materials, consisting in compacting the powder in the closed die and sintering it next, the isostatic pressing method, and the modern pressureless forming powder metallurgy. Forming methods were developed during the investigations for high-speed and non-alloy steel powders, making it possible to obtain materials with three layers in their structure. Investigations included determining the sintering conditions, and especially the temperature and treatment cycle, as well as examining the selected mechanical properties. It was found out, basing on the comparison of structures and properties of test pieces made with the pressureless forming method, as well as with the isostatic pressing and pressing in the closed die, with further sintering, that in structures of all examined test pieces in the sintered state fine carbides occurred distributed homogeneously in the high-speed steel layer. It was noticed, that increase of the sintering temperature, regardless of the manufacturing method, results in the uncontrolled growth and coagulation of the primary carbides and melting up to forming of eutectics in layers consisting of the high-speed steel. It was found out basing on the microhardness tests that hardness of test pieces both those pressureless formed, compacted in the closed die, and isostatically cold pressed and sintered grows along with the sintering temperature. It was also noted that the sintering temperature range is bigger in case of the pressureless formed materials.

Effect of hot isostatic pressing method to enhance quality of tin powder

2020 ◽  
Author(s):  
Abdul Basyir ◽  
Agus Sukarto Wismogroho ◽  
Didik Aryanto ◽  
Wahyu Bambang Widayatno
Keyword(s):  
Hot Isostatic Pressing ◽  
Pressing Method ◽  
Isostatic Pressing
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