ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Novel hybrid TiB, TiC and rare earth oxide (Re2O3) reinforced titanium matrix composites werein situ synthesized utilizing the reaction between Ti, B4C (or C), rare earth (Re) and B2O3 throughhomogeneously melting in a non-consumable vacuum arc remelting furnace. In this work, Nd and Ywere chosen as rare earth (Re) added in the in situ reaction. The thermodynamics of in situ synthesisreaction was studied. The results of X-ray diffraction (XRD) proved that no other phases appearedexcept for TiB, TiC and Re2O3. The microstructures of the composites were examined by scanningelectron microscope (SEM) and backscattered scanning electron microscope (SEM). The resultsshowed that there were mainly three kinds of reinforcements: TiB whiskers, TiC particles andRe2O3 particles. The reinforcements were fine and were homogeneously distributed in the matrix.The interfaces of TiB-TiC and Nd2O3-Ti were examined by high-resolution transmission electronmicroscopy (HREM).Transmission electron microscopy (TEM) and selected area diffraction (SAD)were used to analyze the orientation relationships of TiB-TiC and Nd2O3-Ti. The orientationrelationship between TiB and TiC can be described as: [001] TiB //[001] TiC , (010) TiB //(110) TiC . Theorientation relationship of Nd2O3 and α-Ti can be described as: [110] Nd2O3 //[ 1213 ] Ti ,(111) Nd2O3 //(1101) Ti , ( 001) Nd2O3 //( 2110 ) Ti
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.127.155.pdf
