آخرین محصولات
Microstructure, Tensile Properties, and Wear Resistance of In Situ TiB2
In-situ synthesized TiB2/6061 composites were prepared from Al-K2TiF6-KBF4 by high energy ball milling and stir casting. Phase analysis and microstructure observation of the samples were ...
Tribological properties and tool wear in milling of in-situ TiB2…
The appropriate range of milling parameters for in-situ TiB 2 /7075 composite was obtained through pre-experiment [12], [50]. Down milling was adopted, the spindle speed was 4000 rpm, the feed per tooth was 0.05 mm/z, the radial width of cutting was 0.5 mm, and the axial depth of cutting was 2 mm.
Synthesis of TiB 2 nanocrystalline powder by mechanical …
Abstract. TiB2 nanocrystalline powder was synthesized by mechanical alloying of Ti-67B elemental powder. X-ray diffraction (XRD) and transmission electron …
The Effect of Micron-Sized TiB2 Particles on the …
In this study, dual-scale (micron, nano) TiB 2 particle-reinforced aluminum matrix composites were prepared using powder metallurgy. The reinforcement was introduced via a direct addition …
Sequence of phase evolution during mechanically induced …
Both powder mixtures were processed in a planetary ball Fritsch P-5 ball mill under Ar atmosphere, varying the milling parameters: rotary speed (150 and 200 rpm), size of balls (10 and 19mm ...
Microstructures and mechanical properties of B 4 C-TiB 2
First, B4C–TiB2 composite powders were synthesized from TiC–B powder mixtures at 1400 ℃, then mixed with commercial B4C powders by ball milling and the B4C–TiB2 ceramic composites were ...
Sintering, Mechanical and Optical Properties of TiB2 …
TiB 2 ceramics were prepared through hot-pressing sintering after ball milling or high-energy milling using WC-Co milling media for four different …
(PDF) Characterization of structure and properties of TiN–TiB2 …
The TiB2-Ti composites with different concentrations of the Ti metallic second phase were prepared by the spark plasma sintering. We investigated the tribological properties of TiB2 and TiB2-Ti materials by ball-on-disc technique on the HTT CSM tribometer under loads of …
Titanium diboride (TiB2)
Titanium diboride (TiB2) is a gray-black hexagonal crystal or powder with excellent overall performance, excellent thermal stability, oxidation resistance and electrical conductivity. TiB2 is used for hot-pressed ceramic products that require good electrical conductivity, industrial aluminum electrolytic cell cathode coating materials, hot ...
Effects of TiB2 content on microstructural evolution, …
The milling jar made of martensitic stainless steel X105CrMo17 and the milling balls made of stainless steel 304 were used for the ball milling process. The rotation speed was 300 rpm, and the ball-to-powder weight ratio was 15:1. Besides, 2.0 wt% stearic acid was added during the ball milling to alleviate the cold-welding of the …
Experimental study on chip formation and surface quality in milling …
ABSTRACT. The in-situ TiB 2 /Al alloy composites are widely used in the aerospace industry due to excellent properties. Although TiB 2 /Al alloy composites have been investigated with regard to tool wear, surface defects and cutting force, chip formation is not widely covered but is crucial to understand the machinability. Therefore, milling …
Processing, Microstructure and Mechanical Properties of TiB2 …
Titanium boride (TiB2) is a material classified as an ultra-high-temperature ceramic. The TiB2 structure is dominated by covalent bonds, which gives the materials based on TiB2 very good mechanical and thermal properties, making them difficult to sinter at the same time. Obtaining dense TiB2 polycrystals requires a chemical or physical …
Effect of ball milling on reactive spark plasma sintering of B4C–TiB2
The influence of mechanical activation by ball milling (BM) of Ti, B and graphite powders mixture on the synthesis of dense B4C-41% vol. TiB2 composite by Spark Plasma Sintering (SPS) is investigated.
Production of Dispersion-strengthened Cu-TiB2 Alloys …
Dispersion-strengthened copper with TiB2 was produced by ball-milling and spark plasma sintering (SPS).Ball-milling was performed at a rotation speed of 300rpm for 30 and 60min in Ar atmosphere by using a planetary ball mill (AGO-2). Spark-plasma sintering was carried out at 650℃ for 5min under vacuum after mechanical alloying. The hardness ...
Microstructure evolution and properties improvement of in-situ TiB2
Semantic Scholar extracted view of "Microstructure evolution and properties improvement of in-situ TiB2/6061 composites via trace Mn addition" by Weibin Zhuang et al. ... In-situ synthesized TiB2/6061 composites were prepared from Al-K2TiF6-KBF4 by high energy ball milling and stir casting. Phase analysis and microstructure observation of …
Microstructures and mechanical properties of in-situ TiB2…
In-situ 2 vol.% TiB 2 particle reinforced Al−xSi−0.3Mg (x=7, 9, 12, 15 wt.%) composites were prepared by the salt–metal reaction, and the microstructures and mechanical properties were investigated. The results show that the TiB 2 particles with a diameter of 20–80 nm and the eutectic Si with a length of 1–10 μm are the main …
Effects of ball milling on the densification behavior, …
The effects of ball milling on TiB2 powder composition and densification behavior, mechanical properties, and microstructures of the ceramic composites were investigated. TiO2 and B2O3 in the raw ...
What to Know About Harvey Tool's TiB2 Coating
What is Harvey Tool's TiB2 Coating? Harvey Tool's TiB2 coating is a Titanium Diboride, ceramic-based coating that provides superb erosion resistance during machining.TiB2 is added to a tool by a method called Physical Vapor Deposition (PVD), which is conducted in a vacuum where particles are vaporized and applied onto a …
Microstructure and mechanical properties of B4C-TiB2-SiC …
B4C–TiB2–SiC composites toughened by composite structural toughening phases, which are the units of (TiB2–SiC) composite, were fabricated through reactive hot pressing with B4C, TiC, and Si as raw materials. The units of (TiB2–SiC) composite with the size of 10-20 μm are composed of interlocking TiB2 and SiC with the size of 1-5 μm. …
Microstructures and mechanical properties of in-situ SiC-TiB2 …
An in situ SiC-TiB 2 ceramic composites was fabricated by infiltrating the Al-Si alloy melt into pre-sintered porous preforms with different B 4 C/TiC weight ratios. The phase composition and microstructure of the SiC-TiB 2 ceramic composites were analyzed to understand the synthesis mechanism of the composites. TiB 2 and SiC were …
Production of Dispersion-Strengthened Cu-TiB 2 Alloys by Ball-Milling
Dispersion-strengthened copper with TiB2 was produced by ball-milling and spark plasma sintering (SPS).Ball-milling was performed at a rotation speed of 300rpm for 30 and 60min in Ar atmosphere by ...
Achieving both high hydrogen capacity and low
In this work, TiB2 was introduced by ball milling to improve the decomposition performance of AlH3. AlH3 + x wt% TiB2 (x = 2.5, 5, 7.5, 10) composites were prepared by ball milling, and the ...
Microstructure, Tensile Properties, and Wear Resistance of In …
In-situ synthesized TiB2/6061 composites were prepared from Al-K2TiF6-KBF4 by high energy ball milling and stir casting. Phase analysis and microstructure …
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Tool wear mechanisms in axial ultrasonic vibration assisted milling …
The in-situ TiB2 particle reinforced aluminum matrix composites are materials that are difficult to machine, owing to hard ceramic particles in the matrix. In the milling process, the polycrystalline diamond (PCD) tools are used for machining these materials instead of carbide cutting tools, which significantly increase the machining cost. In this …
Effect of Ball Milling on Simultaneous Spark Plasma Synthesis and
The effect of ball milling pre-treatment of the starting Ti, B4C and C powders mixture on the synthesis of dense TiC/TiB2 composite was investigated through the combined use of a SPEX mill and the ...
Achieving both high hydrogen capacity and low
AlH 3 is a metastable hydride with a high hydrogen density of 10.1 wt% and it can release hydrogen at a low temperature of 150–200 °C. Many additives (e.g., NbF 5, TiF 3, etc.) introduced by ball milling can significantly reduce the decomposition temperature of AlH 3, but often simultaneously decrease the available hydrogen …
Microstructure and mechanical properties of B4C–TiB2–SiC composites
Micro-morphology of mixed powder after ball milling. Fig. 2 shows the microstructure of powder mixtures with different contents of SiC. The dark gray areas are B 4 C particles, the larger bright gray areas are TiB 2 particles, and the smaller bright gray areas are SiC particles. A relatively large TiB 2 particle can be observed from Fig. 2 a …
Production of Dispersion-Strengthened Cu-TiB2 Alloys by Ball-Milling …
Dispersion-strengthened copper with TiB2 was produced by ball-milling and spark plasma sintering (SPS).Ball-milling was performed at a rotation speed of 300rpm for 30 and 60min in Ar atmosphere by using a planetary ball mill (AGO-2). Spark-plasma sintering was carried out at 650°C for 5min under vacuum after mechanical alloying. The …
Effect of separate and combined milling of Cu and TiB2 …
The Cu–TiB2 composites were processed using Cu–TiB2 powders combined milling, a powder mixture consisting of separately milled Cu & TiB2 and a powder mixture prepared by the combination of ...
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