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METHOD OF PRODUCING TITANIUM BORIDE/ZIRCONIA-ALUMINA COMPOSITE, AND TITANIUM BORIDE/ZIRCONIA-ALUMINA COMPOSITE OF EXCELLENT HARDNESS AND TOUGHNESS
To provide a titanium boride/zirconia-alumina composite of high hardness and excellent toughness, and to provide a method of producing the same.SOLUTION: A method of producing a titanium boride/zirconia-alumina composite includes: a step (A) of preparing a Y2O3 partially stabilized ZrO2/Al2O3 powder mixture by mixing Y2O3 partially stabilized ZrO2 powder having a molar ratio of zirconia (ZrO2)/yttria (Y2O3) of 97.0:3.0 to 98.0:2.0 and alumina (Al2O3) powder in a molar ratio of 80:20 to 75:25; a step (B) of preparing a cubic crystal boron nitride (c-BN) powder, mixing the c-BN powder with the Y2O3 partially stabilized ZrO2/Al2O3 powder mixture in a volume ratio of 30:70 to 60:40, and then molding the resulting powder mixture by a cold isostatic press; and a step (C) of enclosing the molded product obtained in the step (B) in a heat-resistant glass vessel and then perform sintering under an inert gas atmosphere by a hot isostatic press.SELECTED DRAWING: Figure 1
【課題】高硬度・強靱性チッ化ホウ素／ジルコニア‐アルミナ系コンポジット及びその製造方法を提供する。【解決手段】ジルコニア（ＺｒＯ２）及びイットリア（Ｙ２Ｏ３）としてのモル比率が９７．０：３．０〜９８．０：２．０であるＹ２Ｏ３部分安定化ＺｒＯ２粉末と、アルミナ（Ａｌ２Ｏ３）粉末を８０：２０〜７５：２５のモル比率にて混合してなるＹ２Ｏ３部分安定化ＺｒＯ２／Ａｌ２Ｏ３混合粉体を準備し（工程Ａ）、立方晶チッ化ホウ素（ｃ−ＢＮ）粉体を準備し、当該ｃ−ＢＮ粉体と、前記Ｙ２Ｏ３部分安定化ＺｒＯ２／Ａｌ２Ｏ３混合粉体を３０：７０〜６０：４０の体積比率で混合し、得られた混合粉体を冷間静水圧プレスにて成形し（工程Ｂ）、前記工程Ｂで得られた成形体を耐熱ガラス容器内に封入し、不活性ガス雰囲気下で熱間静水圧プレスにて焼結を行う（工程Ｃ）。【選択図】図１
METHOD OF PRODUCING TITANIUM BORIDE/ZIRCONIA-ALUMINA COMPOSITE, AND TITANIUM BORIDE/ZIRCONIA-ALUMINA COMPOSITE OF EXCELLENT HARDNESS AND TOUGHNESS
To provide a titanium boride/zirconia-alumina composite of high hardness and excellent toughness, and to provide a method of producing the same.SOLUTION: A method of producing a titanium boride/zirconia-alumina composite includes: a step (A) of preparing a Y2O3 partially stabilized ZrO2/Al2O3 powder mixture by mixing Y2O3 partially stabilized ZrO2 powder having a molar ratio of zirconia (ZrO2)/yttria (Y2O3) of 97.0:3.0 to 98.0:2.0 and alumina (Al2O3) powder in a molar ratio of 80:20 to 75:25; a step (B) of preparing a cubic crystal boron nitride (c-BN) powder, mixing the c-BN powder with the Y2O3 partially stabilized ZrO2/Al2O3 powder mixture in a volume ratio of 30:70 to 60:40, and then molding the resulting powder mixture by a cold isostatic press; and a step (C) of enclosing the molded product obtained in the step (B) in a heat-resistant glass vessel and then perform sintering under an inert gas atmosphere by a hot isostatic press.SELECTED DRAWING: Figure 1
【課題】高硬度・強靱性チッ化ホウ素／ジルコニア‐アルミナ系コンポジット及びその製造方法を提供する。【解決手段】ジルコニア（ＺｒＯ２）及びイットリア（Ｙ２Ｏ３）としてのモル比率が９７．０：３．０〜９８．０：２．０であるＹ２Ｏ３部分安定化ＺｒＯ２粉末と、アルミナ（Ａｌ２Ｏ３）粉末を８０：２０〜７５：２５のモル比率にて混合してなるＹ２Ｏ３部分安定化ＺｒＯ２／Ａｌ２Ｏ３混合粉体を準備し（工程Ａ）、立方晶チッ化ホウ素（ｃ−ＢＮ）粉体を準備し、当該ｃ−ＢＮ粉体と、前記Ｙ２Ｏ３部分安定化ＺｒＯ２／Ａｌ２Ｏ３混合粉体を３０：７０〜６０：４０の体積比率で混合し、得られた混合粉体を冷間静水圧プレスにて成形し（工程Ｂ）、前記工程Ｂで得られた成形体を耐熱ガラス容器内に封入し、不活性ガス雰囲気下で熱間静水圧プレスにて焼結を行う（工程Ｃ）。【選択図】図１
METHOD OF PRODUCING TITANIUM BORIDE/ZIRCONIA-ALUMINA COMPOSITE, AND TITANIUM BORIDE/ZIRCONIA-ALUMINA COMPOSITE OF EXCELLENT HARDNESS AND TOUGHNESS
チッ化ホウ素／ジルコニア‐アルミナ系コンポジットの製造方法及び、優れた硬度及び靱性を有するチッ化ホウ素／ジルコニア‐アルミナ系コンポジット
HIROTA TAKESHI (author) / KATO MASAKI (author) / KOSUGE YUTA (author)
2020-11-26
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
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