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 hardness of the specimens …
Nanocomposites of Si and were prepared using a SPEX-8000 high-energy mechanical mill. Commercial elemental powder of Si (Aldrich, 99.9%) and (Aldrich, 99%)) were used as starting materials. Stoichiometric amounts of the powders were weighed and loaded into a hardened steel vial containing hardened steel balls.
The results showed that during ball milling the Al/B2O3/Ti reacted with a combustion mode producing Al2O3–TiB2 nanocomposite. In the final stage …
The ball-milling was carried out in a polyethylene cup with ethanol and SiC balls (4.0 mm in diameter, Haining Kewei Bearing Co. Ltd., China). The rotary speed was 300 rpm and the milling time were 0 h, 2 h, 6 h, 12 h, and 24 h; according to the milling time, the final products were denoted as BTS0h, BTS2h, BTS6h, BTS12h, and BTS24h, respectively.
A novel method for the synthesis of transition-metal boride nanopowder has been developed using a mechanochemical reaction between LiBH 4, LiH and transition-metal chloride (TiCl 3 and VCl 3) by high energy ball milling.This method successfully produces TiB 2 and VB 2 particles dispersed within a soluble LiCl matrix. Subsequent washing with distilled water, …
Mechanochemical ball-milling enabled the direct amidation of esters through simple coupling under basic conditions (see scheme). A wide range of esters underwent amidation by this method with an array of primary and secondary amides without the need for a bulk solvent, catalysts, or additives.
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 characterized by XRD, SEM and EDS, respectively. The effect of TiB2 particle content on the microstructure, tensile properties and wear resistance of the composites was …
This work discusses on the effect of milling parameters on the TiB and TiB2 formation in Ti-50at%B and Ti-66at%B powders, respectively. 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 diameter) and ball-to-powder weight …
An efficient and practical approach for the synthesis of sulfonyl quinolines via ball milling promoted coupling of haloquinolines with sulfonic acid under metal-, solvent- and additive-free conditions has been developed. In contrast to the solvent-based sulfonylation reactions, this protocol has the advantage of shorter reaction time (10–20 min), mild reaction temperature, …
TiB 2 /6063Al matrix composites are fabricated from Al–TiO 2 –B 2 O 3 system by the technology combining high energy ball milling with melt in situ reaction. The microstructure and tensile properties of the composites are investigated by XRD, SEM, EDS, TEM and electronic tensile testing. The results indicate that high energy ball milling technology decreases the in …
Milling Drilling Cutting threads Planing / Plane milling Grinding Surface quality, reworking and de-burring Machining guidelines Interview with Hufschmied Zerspanungssysteme Cooling and cooling lubricants Annealing Morphological changes and post-shrinkage Dimensional stability Product groups and material characteristics TECAFORM AH / AD ...
A mixture of rutile, boron oxide and magnesium has been ball milled together with the intention of inducing a reaction to form titanium diboride. The resultant powders were examined by differential thermal analysis, isothermal annealing and X-ray diffraction to determine the effect of milling on the formation of TiB2.
In this study a composite with AA6082 as the matrix and TiB2 as the reinforcement has been fabricated by in situ method. The effect of TiB2 addition on the mechanical and tribological behaviour has been investigated. The purpose of the study is to improve the friction and wear properties of AA6082 so as to widen the engineering applications of the alloy. The …
The microstructural changes during mechanical alloysing and subsequent hot pressing of Cu, Ti, and B powder mixtures were studied using scanning electron microscopy, X-ray diffraction, differential thermal analysis, and electron microprobe analysis. In particular, the changes in the Cu grain size, lattice parameter, and lattice strain of the powder mixtures and the formation of new …
Syntheses of TiB and TiB 2 by High-Energy Ball Milling p.139. Phase Transformations during the Preparation of Ti 6 Si 2 B by High-Energy Ball Milling ... Syntheses of TiB and TiB2 by High-Energy Ball... Syntheses of TiB and TiB 2 by High-Energy Ball Milling. Article Preview. Abstract: Access through your institution. Add to Cart. Info:
A TiN-TiB2 composite was fabricated by ball milling of the mixture for 70h and then sintering at 5 GPa, 1300 degrees C. The composite has micro-hardness of 8.8GPa and electrical resistivity of …
TiB2 raw powders were treated by planetary ball-milling and the oxidation behavior was analyzed by X-ray photoelectron spectrometer, X-ray difrractometer, energy dispersive X-ray spectrometry.
By combining ball milling processing with combustion synthesis in ultrahigh gravity field, the solidified TiC-TiB2 composite was achieved with fine-grained and ultrafine-grained microstructure. It is considered that taking balling milling processing to mechanically activate powder blend promotes thermal explosion to occur in ultrahigh gravity field by reducing ignition temperature, …
Effects of ball milling on the densification behavior, microstructure, and mechanical properties of TiB2–SiC ceramics Wenchao Guo, Qianglong He, Aiyang Wang, Tian Tian, Chun Liu, Lanxin Hu, Hao Wang, Weimin Wang, Zhengyi Fu; Affiliations Wenchao Guo State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan ...
Abstract Al2O3–TiB2 composites were synthesized using high-energy ball milling from starting powders containing Al, TiO2, and B2O3. To explore the effect of the addition of another ductile metallic phase during milling, 15wt.% Ni was added to a sample of the starting powders. The phase transformations and microstructure of the milled powder mixtures were investigated …
In this study, mechanical alloying (MA) was used to synthesise Al-Fe/TiB2 nanocomposites using aluminium, ferrotitanium and acid boric as raw materials. The powders were mixed and subjected to MA in an attritor ball mill under argon (Ar) atmosphere. Then, the milled powders were heat-treated under Ar atmosphere. The phase transformation, …
Effects of ball milling on the densification behavior, microstructure, and mechanical properties of TiB2–SiC ceramics Journal of Materials Research and Technology ( IF 5.039) Pub Date :, DOI: 10.1016/j.jmrt.2021.11.106
High-energy milling in the Pulverisette7: Similarly to the protocol described before, PMDA and TAB were placed into a 45 mL zirconia jar with 22 10 mm ZrO 2 milling balls and 3.5 g NaCl. Afterwards they were milled at 800 rpm for 20 min inside a Fritsch Pulverisette 7 before being washed in a similar manner as the other samples.